The LTIFR is generally considered the company’s most significant measure of safety performance. The Injury Severity Rate formula is defined as a safety metric which companies use to measure how critical the injuries sustained in a period of time where by using the number of lost days (on average) per accident as a proxy for severity and is represented as R i = D l *1000/ N mh or Injury Severity Rate = Lost Days *1000/ Man Hour. The website delivers national work health and safety and workers’ compensation data in an intuitive, user-friendly way. frequency rate, which is limited to the number of fatalities and lost time. au. 1%) were fatal injuries and 21,176 (57. What we have calculated is the incidence rate. Floor Marking. Incident rate (per 100 employees) Agriculture, forestry and fishing: 2. ”Incidence rates. 869 131. 4 18. Your best option is to use MS Excel, and add the formulas to calculate it automatically on a revolving 12 month basis. If a company had 5 recordable injuries in a year, and the total number of hours worked by all employees during the year was 500,000: OSHA Incident Rate = (5 × 200,000/500,000) = 2. Downer’s Lost Time Injury Frequency Rate (LTIFR) was also below target at 0. Also differences in long-lasting diseases were relevant. It is clear from observing the number of injuries in IDB that the 232. Just a different variation of KPI’s (lower area) The hours must be entered in on the hours row they will automatically update rolling average of hours. Whatever the type of injury, a high injury frequency rate within business operations must be addressed to further improve the facility’s safety. Duration rate — the average number of work days lost per injury. Sorry I meant to say its the incidence rate not frequency rate. With their LTIFR calculated, this company can compare it to the rate for the construction industry as a whole. done by calculating exposure-adjusted incidence rate, 100-patient years. A lost-time injury (LTI) is something that results in a fatality, permanent disability, or time lost from work. 2. Number of recordable incidents (injuries and illness) per 100 full-time employees. together to determine the outcome of a patient following an injury. (19. A recent report compared sharps injury rates in 10 Midwestern facilities that differed in size and scope of operation. 4. 00 0. 1. 5% from 2021 An injury frequency rate is the number of injuries per 1,000,000 employee-hours worked. To calculate the TRIFR in Australia, we divide the number of recordable injuries in a 12-month period, by the number of hours worked by all staff in the same 12-month period, then multiply this figure by one. § Worker-months are the number of full-time equivalent workers at a facility (or group of facilities) multiplied by the number of months worked within the reporting period. 1. If the injury does not cause loss of time in the period in which it occurs but in a subsequent period. Some people confuse this formula with the formula for lost time injuries, but the total recordable injury frequency rate includes all injuries requiring medical treatment from a medical professional - which in theory means that it will be a larger number. 4. Take the number from Step 3 and divide it by the number from Step 2. LTIFR Lost Time Injury Frequency Rate Lost-time injury frequency rates refer to the number of lost-time injuries within a given accounting period, relative to the total number of. 26 to 0. As you can see from the above formula and calculation, a low severity. [1] An example of incidence would be 795,000 new strokes in the United States, annually. For instance, an above-average TRIF can lead to increased insurance costs or unannounced safety inspections. For example, if you you were to calculate the frequency rate of lost time injuries (LTI's), you would first find the number of lost time injuries in the reporting. of employed Persons 2. 7) and Star Entertainment Group (22. One Month LIBOR Rate means, with respect to any interest rate calculation for a Loan or other Obligation bearing interest at the Alternate Base Rate, a rate per annum equal to the quotient (rounded upward if necessary to the nearest 1/16th of one percent (0. The LTIFR is the average. According to the WSIB, lost time injury rates in Ontario – which were already quite low to begin with – declined by about 39 percent over the last decade, suggesting that employers are making solid progress towards creating safer. Significant and Substantial (S&S) Rate Calculator. 1. 13. The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. 14%) were fatal injuries and 26,383 (55. Now, you are probably wondering what makes a strong TRIR. The teams overall injury incidence was of 9. For example, if you you were to calculate the frequency rate of lost time injuries (LTI's), you would first find the number of lost time injuries in the reporting. For every injury fatality in Europe, there areThe injury severity rate represents the number of lost work days experienced per 100 workers. General overview. : Frequency Rate (FR) = (Number of Recordable Incidents / Total Hours Worked) x 1,000,000 Frequency Rate (FR) = (20 / 500,000) x 1,000,000 Frequency Rate (FR) = 40. ([Number of lost time injuries in the reporting period] x 1,000,000) / (Total hours worked in the reporting period) RIFR: Reportable Injury Frequency Rate The lost time injury severity rate calculation is: Total number of lost workdays/Total number of OSHA recordable incidents. (OSHA requires accident rates to. Draft resolution concerning statistics of occupational injuries 39 Annex A: Classification of economic activities 4 5Incident Reporting Analysis10. 1 Major Injury rate 17. Injury frequency rate can be calculated by the following formula: Accident Incidence Rate Formula. (N/EH) x 200,000 <class=bold>=. The disabling injury frequency rate (DIFR), calculated from workers compensation returns, is the most frequently used index for drawing conclusions about accident trends and for comparing local safety performance with other countries. COMPUTATION OF FREQUENCY AND SEVERITY RATES FOR INDUSTRIAL INJURIES AND CLASSIFICATION OF INDUSTRIAL ACCIDENTS ( First Revision ) 0. Dissemination 21 10. Injury and Illness Allows users to calculate injury and illness incidence rates for their specific establishment or firm and to compare them with the averages for the Nation, for States, and for the industry in which the establishment. The denominator is now the sum, in months, of the person-time at risk contributed by all participants. Conversely, suppose it’s known that people who do not smoke develop lung cancer at a rate of 1. The 2020 DIFR for the federal jurisdiction is 7. That's a very important question! Your DIFR report is your Disabling Injury Frequency Rate report which examines the ratio between actual disabling injuries per million-man hours worked, expressed as a percentage. Lost time injuries – Employees Lost time injuries – Contractors 0 100 200 300 400 500 600 700 0 2 4 6 8 10 12 14company can calculate their rate(s) and get a percentage per 100 employees. LTIFR = (14 / 800,000) x 200,000 = 3. To calculate your LTIFR, simply plug those numbers into your formula: (6 x 1,000,000) / 2,500,000 to get a LTIFR = 2. Table 7b: Rate of confirmed occupational diseases incidence by selected industry, 2021-2022 Table 7c: Number of confirmed occupational diseases cases by type, 2021-2022. 83, 2. Oct 10, 2013. on your unit . Calculation of overall national Incidence Rate (IR) b. Within the work book there is two types of sheets one with Leading Indicators Under the Monthly Stats Tab, The other is under the current Stats Tab. The formula for calculating lost time injury frequency rate is the number of lost time injuries multiplied by 1,000,000, divided by the employee total hours worked. 17. Calculate Injury/Illness Rates. Calculate your Total Recordable Case Incidence Rate (TCIR) for each of the past 3 years and for the 3 years combined. The calculation is based upon the number of lost time injures within a given period. 5. Workplace Injuries 2 Workplace Injury Rate = No. Jumlah lembur 20. There are others but I think this is what you are trying to calculate. What is the total recordable injury frequency rate? Some people confuse this formula with the formula for lost time injuries, but the total recordable injury frequency rate includes all injuries requiring medical treatment from a medical professional – which in theory means that it will be a larger number. Using this TRIFR calculation formula, the result is the total recordable injury frequency rate. (The 200,000 hours in the formula represents the equivalent of 100 employees working 40 hours per week, 50 weeks per year, and provides the standard. 7%) were disabling injuries, 49 (0. Analyzed in detail as below. Now that you’ve successfully calculated your LTIFR, you can use that data to benchmark performance and. Note 1: Beginning in 2020, all TSMC employees and contractors will be included in the calculation of incident rate per 1,000 employees Note 2: Beginning in 2020, Disabling Injuries Frequency Rate (FR. 8. Incidence rates for alpine skiing, freestyle skiing, Nordic skiing, and snowboarding were 3. during April. 478 167808 2. 85 470 312. Synonyms. If you need help calculating your company's OSHA TRIR rate, please call (720) 547-5102. 1 injury. 0625%)) of (i) the rate per. Incident rates are collected on a per-company basis and are then aggregated by industry, demographics, and other. The estimated number of people with an over-3-day absence injury at any time. Absolute differences ranged from 4. A total of 369. 6) and badminton (2. Calculating the Total Recordable Incident Frequency, or TRIF, is a critical component of monitoring safety performance for any organization. 1 Therefore, the calculation of. Safety observations frequency rate (SOFR) The number of safety observations per 200,000 hours worked. ) DISABILING INJURY SEVERITY RATE. 2) Injury Severity Rate = (No. 5. 0000175. Out of the total number of injuries reported in 2021, 16,342 (44. Industry benchmarking. An incidence rate of injuries and illnesses may be computed from the following formula: (Number of injuries and illnesses X 200,000) / Employee hours worked = Incidence rate. The TRIFR is the number of injuries (excluding fatalities) requiring medical treatment per million hours worked within an organisation. of fatalities / No. Injury Frequency Rates – MTIFR- Scheme Vs Non Scheme13. Vehicle Accident Rate – Criteria for Reporting & Calculating 12. This easy-to-use calculator will determine your facility’s OSHA Incident Rate. HSP measures which were introduced from 1 Sep 2022, helped to abate the spate Increasingly, sports injury data are reported as incidence rates—for example, injuries per 1000 hours played—that is, using numerator and denominator data—as this methodology takes account of the exposure time at risk. – All injury frequency rate (AIFR) = number of all injuries x 200,000/hours of exposure. Incident Frequency Rate (TRIFR) indicator A measure that indicates safety performance for a business determined by how many events have occurred for the hours worked. frequency of injuries and illnesses that occur within a given amount of time and is typically based on 100 full-time workers for a one-year period. 77 organisations voluntarily provided data for one or more of the 8 indicators, 41 of which. We conducted an in-depth meta-analytic systematic review that assesses the injury incidence of professional snow sports. The formula is given as: (Number of lost-time injuries in the accounting period x 1,000,000) / (Total hours worked in the accounting period) To make it. 75. This is a decrease of 288 total injuries from 2020 (37,024). The rate shows how safe the working conditions are for the employees of the company. 25. 3), Qantas (24. Sources of data 23 11. The total recordable injury frequency rate (TRIFR) is the number of fatalities, lost time injuries, cases or substitute work and oth. TRIR = 2. As you can see, there are just three parts of the LTIFR formula, two of which need to be reconciled on your end, and then the 1,000,000 figure which. This report, when used correctly, can be a very useful tool which you can use to establish how severe your workplace incidents are. LTIFR refers to Lost Time Injury Frequency Rate, the number of lost time injuries occurring in a workplace per 1 million hours worked. Total Recordable Injury Frequency Rate: TRIFR: Number of fatalities, lost time injuries, substitute work, and other injuries that required treatment from a medical. เดือน หรือ. Telephone Toll-Free: 1-855-282-9222 or 416-581-8875. 9 TRCF. Slide 21How to Calculate: OSHA Recordable Incident Rate. com. 8 million injury and illness cases in 2022, up 7. 1% to 418. 061 43. 5% from the 2016 DIFR of 9. Take the number from Step 3 and divide it by the number from Step 2. HTML | PDF | RSS | Charts Employers report 2. Helps. The total recordable injury frequency rate (TRIFR) is the number of fatalities, lost time injuries, cases or substitute work and other injuries requiring medical treatment by a medical professional per million hours worked. DIFR Calculator = Number of incidents multiplied by 200 000 hours divided by the actual number of hours worked. (See INCIDENCE RATE. An LTIFR of 7, for example, shows that 7 lost time injuries occur on a jobsite every 1 million hours worked. 60 in FY21. 138 508288 4. 6 fatalities per 100,000 full-time equivalent (FTE) workers, up from 3. LTI is a Lost Time Injury (a work-related injury resulting in the loss of one or more complete workdays/shifts). For example, if all your employees during last year worked for a total. Terjadi 60. 2 is the number that company would compare to the national rates. The resulting calculation would be: (5 recorded 'injuries' x 1,000,000) / 200,000. คือ จํานวนคนที่ได้รับบาดเจ็บ หรือ การเจ็บป่วยที่บันทึก ต่อการทํางาน . The formula is as follows: ( [Number of lost time injuries in the reporting period] x 1,000,000) / (Total hours worked in the reporting period). One of the primary reasons for measuring LTIR is to identify and prevent Lost Time Incidents (LTI) in the workplace. per 100 FTE employees). 2008-09 17. Re = total number of eligible respondents. per day . 2 1. TRIFR = { (LTI + MTI + RWI) x 1,00,000} / Hours Worked. if you want RIDDOR AFR only use RIDDOR number of accidents and formula is the same. Medical Treatment Injury Frequency Rate Formula. 4: Manufacturing: 2. 1 Risks and rates are 2 distinct ways of measuring the incidence of sports injury, but many people incorrectly assume that rates and risks are essentially one and the same. LTIFR or the lost time injury frequency rate is a safety measure which refers to the number of lost time injuries occurring per 1 million hours worked. In a strict application, "rate" should only be used when the denominator is an estimate of the total person-time at risk. LTIFR is Loss Time Injury Frequency Rate as same IFR but use especially absent cases to instead of total cases This formular LTIFR = Absent Cases x 1,000,000 Total Man-Hours This meaning everymillion man-hours is happening absent accident LTIFR cases. A study in USA concluded that CI was responsible. COMPUTATION OF FREQUENCY AND SEVERITY RATES FOR INDUSTRIAL INJURIES AND CLASSIFICATION OF INDUSTRIAL ACCIDENTS ( First Revision ) 0. Lost-time injury frequency rate (LTIFR) industry benchmarks, 2018-19 to 2020-21p. The fatal work injury rate was 3. 7: Mining: 1. Of the total number of injuries in 2020, 15,799 (42. When it comes to LTIs, instead of looking to a lost time injury rate, it’s common to calculate a lost time injury frequency rate (LTIFR). All injury frequency rate (AIFR) 2020 2019 2018 2017 2016 All injury frequency rate (per 200,000 hours worked) - Employees 0,27 0,39 0,43 0,37 0,36 All injury frequency rate (per 200,000 hours worked) - Contractors 0,46 0,44 0,44 0,46 0,54 *Numbers restated from those originally published to ensure comparability over time Determine how much time your business is losing as a result or injuries or illness with the simple Lost Time Incident Calculator. The causes of Near Miss incidents are the same as for injury incidents. To calculate your LTIFR, simply plug those numbers into your formula: (6 x 1,000,000) / 2,500,000. LTIF Example. Safety is becoming more and more important to all workers and all companies, and lost time injury frequency rates should be improved in parallel with this increased attention. Note 3: The injuries from workers' compensation claims are likely to be an underestimate of all lost time injuries due to claims not being made for minor injuries. On the other end of the spectrum, some companies had a perfect 0 TRIFR, while WorleyParsons. doc Page 3 of 7 3. 4. 815 19. Further work 36 Bibliography 37 Appendix. 9 Man-days Lost4 530,961 544,664 Per 100,000 workers A workplace injury is any personal injury or death resulting from a workplace accident, including work-related traffic injuries. 4. “Incidence rate” or “incidence” is numerically defined as the number of. All Injury Frequency Rate (Number of AI / Hours) * 1,000,000. The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. 918 28. The number of reported accidents is derived from your operations, as is the total hours worked, while the number 200,000 is used in a number of safety KPI's to standardise the AFR. The calculation of a business’s lost time injury frequency rate (LTIFR) is done by multiplying the total number of LTIs by one million and then dividing the resulting number by the total number of hours worked during the reporting period. Again, this is what’s most commonly used in Australia. Disabling Injuries Frequency Rate (FR) <0. OSHA established the 200,000 benchmark established by OSHA. of fatalities / No. 4. For example, if you you were to calculate the frequency rate of lost time injuries (LTI's), you would first find the number of lost time injuries in the reporting. And voila! Your company’s LTIFR is 2. They could have worked a theoretical total of 49,248 normal working hours, but a total of 426 hours were lost due to accidents. MTI is Medical Treatment Injury (a work-related injury that requires treatment by a medical practitioner beyond first aid). In all other cases frequency rate F, should be used for comparison purposes. The lower the value deduced from the above calculation, the better. =. This would mean there were 2 recordable injuries for. Lost Time Injury Frequency Rate (LTIFR) is a significant safety metric used to measure the number of Lost Time Injuries (LTIs) occurring within a specific period, usually per one million hours worked. 39. S. July 19, 2017. Updated. In some country, the first aid injury frequency coefficient (F) h determined by. List common epidemiological methods of disease frequency: counts, proportions, ratios, rates, prevalence and incidence. 9 injuries per 100 player-matches and the injury burden of 246. Divide that by 80,000, and you’ll get a recordable incident rate of 7. LTIFR = (14 / 800,000) = 0. I'm trying to do a 12-month trailing (rolling) calculation of LTIF (Lost Time Incident Frequency) for my report. To give you an idea of companies and use cases on the higher end of the total recordable injury frequency rate spectrum, In Australia, the companies with the highest TRIFR in 2017 were WesFarmers (28. 0% from the 2018 DIFR of 9. 2020 National WSH Statistics. So the incidence rate of relief was 6/85 person-hours or on average 7. From the BLS Survey of Occupational Injuries and Illnesses form, if your company was surveyed for the calendar year for which incidence rates are desired—you can add the number of nonfatal recordable cases entered. 1%) were fatal injuries and 20,350 (55. Number of Disabling Injuries refers to. Basic Epidemiological Methods and Calculations. 4: Manufacturing: 2. LTIFR is the number of lost-time injuries (LTI) occurring in a workplace per 1 million hours worked within a given period. (See INCIDENCE RATE. . 75. Fishing Transport Building & Construction Agriculture & ForestryThe incidence rate or incidence meaures the frequency of a specific event over a defined period of time. 1 Minor Injury rate 355 377 Occupational Disease Incidence Rate3 16. The basic formula is (N x 200,000)/EH, or the number of cases (N) multiplied by 200,000 then divided by the number of hours worked (EH) by all employees during the time period, where 200,000 is the base for 100 full-time workers (working 40 hours per week. In medicine, the incidence is commonly the newly identified cases of a disease or condition per population at risk over a specified timeframe. First, determine the total number of injuries over the time between 100 workers. The number of reported accidents is derived from your operations, as is the total hours worked, while the number 200,000 is used in a number of safety KPI's to standardise the AFR. 8. 9th Dec 22. 1-866-777-1360 M-F 6am - 4pm PST. If employees have taken a total of 11 days away from work, spread over 4 recordable incidents, the injury severity rate is: 11/4 = 2. The DART incident rate is also important. Two things to remember when totaling. Most companies choose to calculate LTIFR per 1 million man hours worked. FOREWORD 0. The teams overall injury incidence was of 9. There is a difference between the frequency rate and the. LTIFR = 2. A TRIR calculation is made by taking the number of OSHA recordable incidents your company had in a year, multiplying it by 200,000 (the number of hours that 100 employees, working a 40-hour week, would log in 50 weeks), then dividing that. total number of occupied beds . To do this: Enter all relevant data about each employee into an Excel spreadsheet or similar program; Calculate the total number of accidents occurring during each year by dividing it by 1000 (or any other unit you use); This gives you an idea as to how many times per day or week someone will have an accident while at work. 5. Tổng các sự cố hoặc tai nạn ghi nhận được tối đa tính trên 1 triệu giờ làm việc TRIF Lost time injury frequency rates (LTIFR) Một thương tích mất thời gian là một thứ gây ra tình trạng tàn tật, vĩnh viễn hoặc mất thời gian làm việc. The LTIFR is generally considered the company’s most significant measure of safety performance. (i. 504 2081792 5. 1 year period prevalence proportions were 26. Feedback can also be emailed to statsonline@swa. 1-866-777-1360 M-F. Rates are usually expressed per 100, 1,000, or 100,000 persons. 3. This is below industry benchmarks published by Safe Work Australia for all. (Number of OSHA recordable cases x 200,000) / Total number of hours worked. Materials and Methods: We used 12 data sources to systematically examine the influence of age, race, sex, database, time-at. Definition. LTIFR = (14 / 800,000) = 0. Incidence Rate = Total no. on your unit during April. Excel does it for me. LTIFR: Lost-time injuries / hours worked x 2,000 (instead of using a factor of 2,000, you could also use 1,000 or 1,000,000 depending on. This translates to a workplace fatal injury rate of 0. The 2019 federal jurisdiction DIFR is 9. The 'result' of the measurement, the total recordable incident rate, is derived from combining the number of safety incidents and total work hours of all employees with a standard employee group; typically 100 employee working 40 hours a week for 50 weeks of the year. Number of injuries. The adjusted estimates for a particular characteristic, such as injury and illness cases involving days away from work, are aggregated to the appropriate level of industry detail. Occupational Safety and Health Administration defines incidence rate as the number of injuries/illnesses × 200000/employee-hours worked, where 200000 represents the. MTI = I / HW * 1,000,000 MT I = I /H W ∗ 1,000,000. E-mail: ctowsey@ctgold. How To Calculate Lost Time Injury Frequency Rate (LTIFR) With Example How To Reduce Your Lost Time Injury Frequency Rate (LTIFR) 1. Historical dataThe severity rate calculation from here would be: Severity rate = (25 lost work days x 200,000) / 2,000,000 hours worked = 1 lost day per accident. People in 100+ countries use this safety management system to. The total number of workplace injuries for 2020 fell by 18%, from 13,779 in 2019 to 11,350 in 2020, while workplace fatalities reduced from 39 in 2019 to 30 in 2020. OSHA Recordable Incident Rate The OSHA Recordable Incident Rate (or Incident Rate) is calculated by multiplying the number of recordable cases by 200,000, and then dividing that number by the number of labor hours at the company. The overall injury incidence rate in our FT/CF study of 5. It provides an idea about the organization’s efforts to protect the workers from work related hazards. The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. 1 injuries per 100 player-matches respectively. the number of accidents. It could be as little as one day or shift. Total number of injuries and illnesses x 200,000. The adjusted estimates for a particular characteristic, such as injury and illness cases involving days away from work, are aggregated to the appropriate level of industry detail. LTIFR will typically be calculated for a specific workplace or. a. 001295. 0 per 100 person-hours of observation. 5 injuries per 100,000 workers from 18. So the formula would be: (4 reported accidents x 200,000) / 115,000 = 6. All the rates were calculated for all the five years. Enter N = Number of Recordable Injuries and/or Illnesses in One Year EH = Total Number of Hours Worked by all Employees in One Year. If employees have taken a total of 11 days away from work, spread over 4 recordable incidents, the injury severity rate is: 11/4 = 2. 75. 0) (Table 5). 7) and Star Entertainment Group (22. Its formula: F = (number of disabling injuries x 106)/employee hours of. Safeopedia Explains Lost Time Injury Incidence Rate (LTIIR) The LTIIR uses the same LTI data as the LTIFR calculation, but rather than using hours as a standardizing factor for the rate, the standardizing factor becomes a number of employees. The formula for calculating a company's incident rate is fairly simple to complete: (The number of incidents in a year x 200,000) / the total number of hours worked by all team members in a year = incident rate. HSP measures which were. Ninety five per cent confidence intervals were calculated for each calculation of accident incidence rate, frequency rate and severity rate. 95 accidents per 100 employees, which could be relatively high depending on the. 7 person-yrs. on your unit in April by. 9 injuries per 100 player-matches and the injury burden of 246. of Fatal and non-Fatal Workplace Injuries x 100,000 No. 000 injury fatalities within the EU every year are only the “tip of the iceberg” in Europe. 10. 8 First. For example, if you you were to calculate the frequency rate of lost time injuries (LTI's), you would first find the number of lost time injuries in the reporting. The resulting calculation would be: (5 recorded 'injuries' x 1,000,000) / 200,000. The formula can also be multiplied by 1,000,000 to get the injury frequency rate per million hours worked which is also a popular way of. As with every other OSHA incidence rate, the LWR is based on the number of injuries and illnesses recorded within an employer’s OSHA 300 log. 1) Disabling injury frequency rate (the most popular expression of industrial safety performance). 2011-12 1. The frequency rate is the number of lost-time accidents per 200,000 person-hours worked. Incidence rate calculation. Location of injuries. As you can see from the above formula and calculation, a low severity. severity rate, incident rate, frequency rate, signature of employer, title, and date. An S&S designation indicates that the underlying safety or health hazard is likely to result in a serious injury or illness. The first step in benchmarking is to calculate the incidence rates for your organization. To determine if playing position was associated with injury in ASPs. These indicators include all injuries where the affected party did not return to their normal duties for the next shift, thereby reducing the ability of users to infl uence statistics through injury management. The standard number is typically 100. Get Catalog | Get Free Samples. E. Explore our current key statistics on work health and safety and workers' compensation. number of occupied beds . Number of people ( employees + contractors) on site in rolling 12 months = 40. company can calculate their rate(s) and get a percentage per 100 employees. We can see the prevalence of COPD in this population only changed by approximately 0. S. This process helps you determine incidence and prevalence rates. 50 Weeks Per Year Incidence Rates are calculated. au.