Analyze a closed cohort study Click on the link for cumulative incidence (risk) data. Enter your data into the two by two tables. Only fill in the yellow cells, all other cells will be automatically generated by the program. The cumulative incidence ratio (CIR) and cumulative incidence difference (CID) for each stratum will appear directly below the two by two table for that stratum (see below). Exposed Unexpos ed Total Exposed Unexpos ed Total Cases 1 17 18 3 7 10 Non-cases 7 257 264 14 52 66 Total 8 274 282 17 59 76 CIR= 2.014705882 CIR= 1.487394958 CID= 0.062956204 CID= 0.05782652 The crude analysis (collapsed over all strata) will appear below the two by two table section and to the left. This will give a crude two by two table as well as the cumulative incidence ratio and cumulative incidence difference (both with 3 sets of confidence intervals) and the hypothesis test of no association (see below). Crude Data Exposed Unexp. Cases 27 44 71 Non-cases 95 443 538 Total 122 487 609 Crude CIR 2.4495 90% CI = 1.6987 3.5322 95% CI = 1.5837 3.7887 99% CI = 1.3811 4.3443 Crude CID 1.310E-01 90% CI = 6.555E-02 1.964E-01 95% CI = 5.302E-02 2.089E-01 99% CI = 2.857E-02 2.334E-01 Hypothesis Test: Z-square = 16.25 dof = 1 p-value = <0.0001
Below the two by two table section and on the right, summary measures will appear. These include the summary risk ratio and summary risk difference (both with 3 levels of confidence intervals and the p-value of the test for homogeneity), a test for no association and a more
You've reached the end of your free preview.
Want to read all 4 pages?
- Summer '14