Table 1

Characteristics of subjects by case-control status, China, 1989–1992

Cases (N = 133) (%)Controls (N = 265) (%)P
Age (yrs)
 40–599.410.50.97
 60–6940.040.4
 ≥7050.049.1
Education
 Illiterate13.010.30.99
 Primary school32.639.0
 High school29.727.6
 College24.622.7
Marital status
 Currently married91.390.90.88
 Divorced/widowed8.79.1
Socioeconomic status
 Low51.546.60.12
 Medium43.451.2
 High5.12.2
Body mass index, kg/cm2 (mean)22.822.81.00
Ever smoked cigarettes60.962.10.90
Ever used alcohol67.257.00.07
Ever had benign prostate hyperplasia48.313.6<0.001
Ever had prostatitis24.36.1<0.001