Introductory Biostatistics
The number ofconcordancesis calculated by C¼a 1 ðb 2 þþbkÞþa 2 ðb 3 þþbkÞþþak 1 bk (The termconcordance pairas used ab ...
Example 1.16 A case–control study of the epidemiology of preterm delivery, defined as one with less than 37 weeks of gestation, ...
C¼ð 15 Þð 100 þ 30 þ 44 þ 23 Þþð 40 Þð 30 þ 23 Þþð 100 Þð 23 Þ ¼ 8380 D¼ð 5 Þð 100 þ 30 þ 40 þ 10 Þþð 44 Þð 30 þ 10 Þþð 100 Þð 1 ...
(a) Among smokers, whether or not shipbuilding and lung cancer are related (b) Among nonsmokers, whether or not shipbuilding and ...
ad n ¼ ð 11 Þð 203 Þ 299 ¼ 7 : 47 bc n ¼ ð 35 Þð 50 Þ 299 ¼ 5 : 85 The process is repeated for each of the other two smoking lev ...
These results are combined to obtain a combined estimate for the common odds ratio: ORMH¼ 7 : 47 þ 28 : 05 þ 4 : 28 5 : 85 þ 16 ...
1.3.5 Standardized Mortality Ratio In a cohort study, the follow-up death rates are calculated and used to describe the mortalit ...
(SMR¼ 0 :445 or 44.5%). This phenomenon, known as the healthy worker e¤ect, is probably a consequence of a selection factor wher ...
Aworksheetor spreadsheet is a (blank) sheet where you do your work. An Excelfileholds a stack of worksheets in aworkbook. You ca ...
you have the the weight and height of 15 men (weights are in C6:C20 and heights are in D6:D20) and you need their body mass inde ...
(a) Aframefor a 2 2 tablewith places identified asrow, column, and data (b) Names of the factors you chose: say,exposure, disea ...
1.4 Epidemic keratoconjunctivitis (EKC) or ‘‘shipyard eye’’ is an acute infectious disease of the eye. A case of EKC is defined ...
(b)Calculate the odds ratio associated with high exposure. Does this result support your conclusion in part (a)? 1.6 Consider th ...
after drinking. Data were tabulated separately for men and women (Table E1.8). TABLE E1.8 Myocardial Infarction Coronary Death D ...
1.10 Table E1.10 provides the proportions of currently married women hav- ing an unplanned pregnancy. (Data are tabulated for se ...
1.13 The frequency distribution for the number of cases of pediatric AIDS between 1983 and 1989 is shown in Table E1.13. Display ...
TABLE E1.15 Tuberculosis X-ray No Yes Total Negative 1739 8 1747 Positive 51 22 73 Total 1790 30 1820 1.16 Sera from a T-lymphot ...
(c) From the result of part (b), fill in the missing death rates (per 100,000 population) in the table. 1.18 The survey describe ...
from the 1973 National Health Interview (a sample of the U.S. popula- tion) were used to examine the relationship between Pap te ...
TABLE E1.22 Daily Alcohol Consumption Age 80 þg 0–79 g 25–44 Cases 5 5 Controls 35 270 45–64 Cases 67 55 Controls 56 277 65 þ Ca ...
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