The following information is used for Q18 - 032. The next section of this case study is limited to the analysis of male

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The Following Information Is Used For Q18 032 The Next Section Of This Case Study Is Limited To The Analysis Of Male 1 (128.06 KiB) Viewed 83 times

The following information is used for Q18 - 032. The next section of this case study is limited to the analysis of male physician respondents, 35 years of age or older. The occurrence of lung cancer in physicians responding to the questionnaire was documented over a 10-year period (November 1951 through October 1961) from death certificates filed with the Registrar General of the United Kingdom and from lists of physician deaths provided by the British Medical Association. All certificates indicating that the decedent was a physician were abstracted. For each death attributed to lung cancer, medical records were reviewed to confirm the diagnosis. Diagnoses of lung cancer were based on the best evidence available; about 70% were from biopsy, autopsy, or sputum cytology (combined with bronchoscopy or X-ray evidence); 29% were from cytology, bronchoscopy, or X-ray alone; and only 1% were from just case history, physical examination, or death certificate. Of 4,597 deaths in the cohort over the 10-year period, 157 were reported to have been caused by lung cancer; in 4 of the 157 cases this diagnosis could not be documented, leaving 153 confirmed deaths from lung cancer. The following table shows numbers of lung cancer deaths by daily number of cigarettes smoked at the time of the 1951 questionnaire (for male physicians who were nonsmokers and current smokers only). Person-years of observation ("person-years at risk") are given for each smoking category. The number of cigarettes smoked was available for 136 of the persons who died from lung cancer. Table 3. Number and rate (per 10,000 person-years ) of lung cancer deaths by number of cigarettes smoked per day. Doll and Hill physician cohort study, Great Britain, 1951-1961. Person- Daily number of cigarettes smoked Deaths from lung cancer Mortality rate per 10.000 person-years years Rate difference per 10,000 person-years Rate Ratio at risk 3 42,800 0.7 referent referent 1-14 22 38,600 15-24 54 38,900 25+ 57 25.100 All smokers 133 102.600 Total 136 145,400 Compute the rate difference for men who smoked 15-24 cigarettes daily, compared to nonsmokers. Provide your answer in a rounded, whole number with no decimals or commas. QUESTION 29 20