Table 2

Results from Poisson regression

Key populations at risk of HIV/AIDS
MCFSWFSWMSMIVDU
Ratio of mean (95% CI)*P valueRatio of mean (95% CI)*P valueRatio of mean (95% CI)*P valueRatio of mean (95% CI)*P value
Age, in decades0.84 (0.74 to 0.95)0.0061.13 (0.84 to 1.51)0.4310.58 (0.52 to 0.65)<0.0010.68 (0.56 to 0.83)<0.001
Sex†
 FemaleRefRefRef
 Male5.46 (3.58 to 8.33)<0.0010.72 (0.54 to 0.96)0.0251.26 (0.76 to 2.08)0.375
Ethnicity
 ChineseRefRefRefRef
 Indian1.43 (1 to 2.06)0.0521.79 (0.8 to 3.99)0.1541.17 (0.85 to 1.63)0.3332.23 (1.04 to 4.81)0.04
 Malay0.19 (0.1 to 0.36)<0.0010.73 (0.29 to 1.81)0.4920.42 (0.28 to 0.61)<0.0013.09 (1.57 to 6.08)0.001
 Other‡2.01 (1.14 to 3.55)0.0161.02 (0.4 to 2.56)0.974
  • *CI refers to confidence interval of the ratio of the means.

  • †No women reported knowing any FSWs. Hence, we could not estimate the sex effect of knowing more FSW.

  • ‡No one who was from other ethnic groups knew any FSW or IVDU.

  • FSW, female sex worker; IVDU, intravenous drug users; MCFSW, male clients of female sex workers; MSM, men who have sex with men; Ref, reference group.