Table 3 Multivariable Poisson regression for sexual health outcomes and its association with substance using classes

Age

0.94

(0.87, 1.02)

0.91

(0.84, 0.99)

0.95

(0.83, 1.08)

0.92

(0.80, 1.06)

Chinese ethnicity (Ref = Non-Chinese)

0.83

(0.53, 1.32)

0.85

(0.53, 1.36)

0.75

(0.35, 1.57)

0.72

(0.35, 1.51)

Cisgender male (Ref = Transgender, genderqueer, or others)

0.83

(0.45, 1.53)

0.77

(0.43, 1.37)

1.59

(0.39, 6.37)

1.42

(0.36, 5.63)

Gay (Ref = Bisexual, queer, or others)

1.13

(0.74, 1.71)

1.04

(0.67, 1.60)

1.32

(0.64, 2.73)

1.19

(0.57, 2.46)

Monthly household income ≥ SGD5000 (Ref < SGD5000)

0.82

(0.55, 1.22)

0.79

(0.52, 1.19)

0.90

(0.47, 1.72)

0.88

(0.46, 1.67)

 Substance-naïve

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

 Substance-novice

1.99

(1.36, 2.92)

2.24

(1.51, 3.33)

1.93

(1.03, 3.61)

2.01

(1.05, 3.85)

 Chemsex

3.10

(1.75, 5.49)

3.28

(1.85, 5.79)

1.60

(0.40, 6.39)

1.64

(0.42, 6.38)