Research Article

Event-Specific Risk Factors Predicting Episodes of Unprotected Anal Intercourse with Male Nonregular Partners among Men Who Have Sex with Men Using Case-Crossover Study Design

Table 3

Frequency distributions of the situational variables.

Episode involving condom use
(i.e., PAI)
Episode involving no condom use
(i.e., UAI)
Col %Col %

Spirit prior to the episode of anal sex
Mood prior to the episode
 Very good/good50.247.4
 Normal44.245.1
 Bad/very bad2.33.3
 Do not know/cannot remember3.34.2
Tiredness prior to the episode
 Very energetic/energetic46.042.4
 Normal45.242.8
 A bit tired/very tired6.010.7
 Do not know/cannot remember2.84.2
Were you (the participant) nervous prior to the sex episode?
 Not at all47.039.5
 Not really39.136.3
 A bit/very much11.220.9
 Do not know2.83.3
Risk assessments
What do you think about the current risk of HIV infection of your sex partner?
 Not infected43.745.6
 Already infected/very high risk/high risk5.14.7
 Very low risk/low risk51.249.7
What do you think about the current risk of STI of your sex partner?
 Not infected43.344.7
 Already infected/very high risk/high risk3.75.6
 Very low risk/low risk53.049.7
Did his penis and anus look clean?
 Yes 73.570.7
How many male sex partners do you think your sex partner had in the last month?
 None20.917.2
 1–529.828.8
 6–103.76.0
 >101.91.9
 Do not know43.746.0
How likely did you think he would use condoms with other male sex partners?
 Very likely/moderate/no other partner58.650.2
 Not likely/never41.449.8
One week before intercourse, did you have UAI with any other male partner?
 Yes 20.914.4
Did you and your sex partner have a third common sex partner?
 Yes7.08.4
Communication  &  planning about condom use
Did you discuss condom use with the partner before UAI/PAI?
 Yes 37.221.4
Did sex partner suggest using a condom?
 Yes 34.016.3
Did sex partner suggest NOT using a condom?
 Yes13.024.2
Did you suggest using a condom?
 Yes 43.720.0
Did you suggest NOT using a condom?
 Yes6.515.3
Did you plan to use a condom during that sexual encounter?
 Yes81.954.9
Did you perceive that the sex partner would like to use a condom?
 Yes50.715.8
Particular sexual behavior
Degree of sexual compulsivity of participant (0–10)
 1–59.46.6
 6–10 90.693.4
Degree of sexual compulsivity of sex partner (0–10)
 1–517.212.1
 6–1082.887.9
Participant’s sexual position
 Insertive46.046.5
 Receptive37.733.0
 Both14.920.5
 Do not know1.40
One month before the episode, did you have any problem with sexual dysfunction?
 Yes6.07.4
During the intercourse, how many sex partners were there?
 196.794.4
 More than 13.35.6
Any erotic activities involved?
 Yes (at least one)*26.022.3
Whether money transaction was involved in the episode?
 No97.796.7
 Yes2.31.9
 Cannot remember01.4
Substance use
Whether you (the participant) or sex partner drank alcohol before the anal sex episode? (if either man drank answer is classified as “yes”)
 Yes17.218.6
Whether you or sex partner used Viagra or psychoactive substances before the anal sex episode?
 Yes2.34.2

Erotic activities include watching sex movie before UAI, reading pornographic magazines, the use of sex toys, SM behaviour, and wearing special outfits.