Group of CD4 (cells/mm3)	Cases: Women with Incident Clinical AIDS (% of cases)	Controls: Selected Women without Incident Clinical AIDS (% of controls)
Overall (Total)	294	294
CD4 < 200	117	59
CD4 200 to < 350	74	80
CD4 350	103	155

Question 3

For the cases, the odds of exposure group 1[CD4 200 to <350 cellsmm³]falls in which interval? Select the one best answer

1. < 0.5
2. [0.50, 0.90]
3. [0.91, 1.25]
4. >1.25

For the controls, the odds of exposure group 1 [CD4 200 to <350 cellsmm³] falls in which interval? Select the one best answer

1. < 0.5
2. [0.50, 0.90]
3. [0.91, 1.25]
4. >1.25