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Table 1 Baseline characteristics of participants in the study cohort

From: Male circumcision and the incidence and clearance of genital human papillomavirus (HPV) infection in men: the HPV Infection in men (HIM) cohort study

  Uncircumcised N = 2564 Circumcised N = 1469  
N % column N % column P-valuea
Age (years)      <0.0001
Mean (SD) 33.3 (10.3) 31.0 (12.2)  
18-30 1125 43.9 841 57.2  
31-44 1125 43.9 421 28.7  
45-70 314 12.2 207 14.1  
Country of residence      <0.0001
USA 247 9.6 1068 72.7  
Brazil 1200 46.8 198 13.5  
Mexico 1117 43.6 203 13.8  
Marital status      <0.0001
Single 955 37.4 861 58.7  
Married 1040 40.7 332 22.6  
Cohabiting 374 14.6 108 7.4  
Divorced/Separated/Widowed 187 7.3 165 11.3  
Current smoker      0.054
No 1931 75.5 1147 78.2  
Yes 628 24.5 320 21.8  
Sexual orientation      <0.0001
MSW 2107 82.5 1285 87.8  
MSWM 162 6.3 55 3.8  
MSM 134 5.2 42 2.9  
No sex 151 5.9 82 5.6  
Lifetime number of female sexual partners      0.025
Median (SD) 6 (2047.3) 7 (78.2)  
0 253 10.6 137 9.7  
1 193 8.1 130 9.2  
2-9 1044 43.6 566 39.9  
10-19 423 17.7 246 17.3  
20-49 355 14.8 238 16.8  
50+ 124 5.2 101 7.1  
Number of female sexual partners in past 3–6 months      <0.0001
Mean (SD) 1.4 (2.3) 1.3 (1.7)  
0 722 30.7 347 24.8  
1 948 40.3 690 49.3  
2 351 14.9 165 11.8  
3+ 329 14.0 197 14.1  
Lifetime number of male sexual partners      <0.0001
Median (SD) 0 (71.1) 0 (25.9)  
0 2132 84.1 1334 90.9  
1 108 4.3 41 2.8  
2-9 173 6.8 55 3.7  
10+ 123 4.9 37 2.5  
Number of male anal sexual partners in past 3 months 0.003
Median (SD) 0 (3.3) 0 (1.0)  
None 2360 92.9 1406 95.7  
1 75 3.0 25 1.7  
2 31 1.2 16 1.1  
3+ 73 2.9 22 1.5  
Diagnosis of STIs, ever      <0.0001
No 2006 81.2 1246 86.8  
Yes 463 18.8 190 13.2  
HPV status at baseline      0.793
Negative 847 33.0 492 33.5  
Positive 1717 67.0 977 66.5  
Six-month visit compliance status      <0.0001
No 1584 61.8 846 57.6  
Yes 980 38.2 623 42.4  
  1. aPearson’s chi-square test was used for statistical comparison between circumcised and uncircumcised men. Some categories do not sum to the total because of missing values. Subjects with unknown values for each characteristic were not included for calculations of p-values.
  2. NOTE: SD, standard deviation; MSW, men who have sex with women; MSWM, men who have sex with women and men; MSM, men who have sex with men, STIs, sexually transmitted infections.