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Table 2 Sexual behaviors, STIs and recreational drug use of the participants in the last six months and univariate analysis of sexual behaviors and HIV seroconversion.

From: HIV incidence among men who have sex with men using geosocial networking smartphone application in Beijing, China: an open cohort study

  All
n (%)
HIV seroconversion χ 2 P value
Yes n (%) No n (%)
Number of sexual partners 8.72 0.01
 0–1 1217 (62.8) 17 (45.9) 1200 (63.2)   
 2–5 603 (31.1) 14 (37.9) 589 (31.0)   
 ≥ 6 117 (6.0) 6 (16.2) 111 (5.8)   
HIV-positive partners 8.12 0.02
 None 915 (47.2) 10 (27.0) 905 (47.6)   
 Yes 87 (4.5) 4 (10.8) 83 (4.4)   
 Not sure 935 (48.3) 23 (62.2) 912 (48.0)   
Anal sex 1.37 0.24
 Yes 1869 (96. 5) 37 (100.0) 1832 (96.4)   
 No 68 (3.5) 0 (0.0) 68 (3.6)   
Using condom for anal sex 11.79 <0.01
 Never 68 (3.6) 3 (8.1) 65 (3.6)   
 Sometimes 601 (32.2) 20 (54.1) 581 (31.7)   
 Every time 1200 (64.2) 14 (37.8) 1186 (64.7)   
Sex role for anal sex 9.55 0.01
 Exclusively receptive 215 (13.1) 15 (40.5) 497 (26.2)   
 Exclusively insertive 723 (44.1) 5 (13.5) 718 (37.8)   
 Versatile 702 (42.8) 17 (46.0) 685 (36.0)   
Group sex 0.34 0.56
 Yes 159 (8.2) 4 (10.8) 155 (6.9)   
 No 1778 (91.8) 33 (89.2) 1745 (93.1)   
Heterosexual sex 0.35 0.55
 Yes 638 (51.6) 10 (58.8) 628 (51.6)   
 No 597 (48.4) 7 (41.2) 590 (48.4)   
Using condom for heterosexual sex 9.63 0.01
 Never 83 (13.0) 4 (40.0) 79 (12.6)   
 Sometimes 156 (24.5) 4 (40.0) 152 (24.2)   
 Every time 399 (62.5) 2 (20.0) 397 (63.2)   
Diagnosed with a sexually transmitted infection 4.88 0.03
 Yes 75 (3.9) 4 (10.8) 71 (3.7)   
 No 1862 (96.1) 33 (89.2) 1829 (96.3)   
Recreational drug use 0.51 0.48
 Yes 382 (19.7) 9 (24.3) 373 (19.6)   
 No 1555 (80.3) 28 (75.7) 1527 (80.4)   
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