Table 4.
Characteristicsa,b | %c (95% CI) in subgroup | %c (95% CI) outcome | Odds ratio (95% CI) | P value | Adjusted odds ratio (95% CI)d | P value | |||||||
Age group (years) | |||||||||||||
|
16-29 | 28.86 (26.36-31.51) | 2.38 (1.62-3.38) | 2.34 (1.62-3.38) | .29 | 0.43 (0.21 -0.86) | .02 | ||||||
|
30-39 | 23.45 (21.39-25.63) | 1.69 (1.04-2.72) | Referent | N/Ae | Referent | N/A | ||||||
|
40-49 | 20.74 (18.91-22.70) | 1.28 (0.68-2.38) | 0.75 (0.34 - 1.68) | .49 | 1.16 (0.45 - 3.01) | .75 | ||||||
|
50-59 | 17.12 (15.55-18.82) | 1.07 (0.38-2.98) | 0.63 (0.20-1.99) | .43 | 1.22 (0.36 -4.18) | .75 | ||||||
|
60-69 | 9.83 (8.65-11.14) | 0.60 (0.13-2.77) | 0.35 (0.07- 1.79) | .21 | 0.66 (0.11 -3.98) | .65 | ||||||
Sexual identity | |||||||||||||
|
Heterosexual | 96.09 (95.35-96.72) | 1.42 (1.08 - 1.91) | Referent | N/A | Referent | N/A | ||||||
|
Lesbian, bisexual, or other | 3.91 (3.28-4.65) | 5.51 (3.12- 9.54) | 4.05 (2.09 - 7.84) | <.001 | 2.27 (1.04-4.94) | .04 | ||||||
Language spoken at home | |||||||||||||
|
English only | 96.25 (2.78-5.04) | 0.84 (0.20 - 3.88) | N/A | N/A | N/A | N/A | ||||||
|
Other | 3.75 (94.96-97.22) | —f | N/A | N/A | N/A | N/A | ||||||
Annual household income | |||||||||||||
|
Very high | 23.16 (21.15-25.31) | 0.51 (0.25-1.06) | Referent | N/A | Referent | N/A | ||||||
|
High | 22.36 (20.33-24.54) | 0.41 (0.17-1.00) | 0.79 (0.25 - 2.53) | .69 | 0.86 (0.28 - 2.67) | .80 | ||||||
|
Middle | 17.68 (15.83-19.69) | 0.58(0.25-1.31) | 1.12 (0.37 - 3.39) | .84 | 1.00 (0.31 - 3.23) | .99 | ||||||
|
Very low or low | 16.73 (14.95-18.68) |
3.25 (2.05) | 6.49 (2.71-15.55) | <.001 | 3.40 (1.12 - 10.35) | .03 | ||||||
Area of residenceg | |||||||||||||
|
Urban | 67.78 (65.44-70.03) | 1.74 (1.26 - 2.40) | Referent | N/A | N/A | N/A | ||||||
|
Regional or remote | 30.54 (28.34-32.82) | 1.19 (0.79 - 1.78) | 0.68 (0.40 - 1.14) | .12 | N/A | N/A | ||||||
High alcohol consumptionh | |||||||||||||
|
No | N/A | 1.44 (1.02 - 2.05) | Referent | N/A | N/A | N/A | ||||||
|
Yes | N/A | 1.82 (1.24 - 2.67) | 1.27 (0.75 - 2.15) | .38 | N/A | N/A | ||||||
Injected drugs in last year | |||||||||||||
|
No | N/A | 1.57 (1.22 - 2.07) | Referent | N/A | N/A | N/A | ||||||
|
Yes | N/A | 2.09 (0.64 - 6.76) | 1.34 (0.39 - 4.62) | .65 | N/A | N/A | ||||||
Smoking status | |||||||||||||
|
Never smoked or former smoker | N/A | 1.56 (1.18 - 2.12) | Referent | N/A | N/A | N/A | ||||||
|
Current smoker | N/A | 1.69(1.03 - 2.81) | 1.08 (0.60 - 1.97) | .81 | N/A | N/A | ||||||
STIi testing in last year | |||||||||||||
|
No test | N/A | 0.89 (0.59 - 1.36) | Referent | N/A | N/A | N/A | ||||||
|
STI test | N/A | 4.25 (2.97 - 6.16) | 4.94 (2.79 - 8.77) | <.001 | N/A | N/A | ||||||
|
STI diagnosis | N/A | 9.99 (4.93 - 19.20) | 12.38 (5.17 - 29.62) | <.001 | N/A | N/A | ||||||
Condom use with most recent partner | |||||||||||||
|
Used condoms | N/A | 3.41 (2.24 -5.15) | 1.06 (0.57-1.96) | .86 | N/A | N/A | ||||||
|
Did not use | N/A | 3.60 (2.34 -5.48) | Referent | N/A | N/A | N/A | ||||||
Number of sexual partners in last year | |||||||||||||
|
1 | N/A | 0.44 (0.22-0.88) | Referent | N/A | Referent | N/A | ||||||
|
2-3 | N/A | 13.37 (9.93-17.77) | 35.13 (16.12-76.59) | <.001 | 32.01 (13.17-77.78) | <.001 | ||||||
|
>3 | N/A | 25.30 (17.20 -35.58) | 77.08 (32.75-181.43) | <.001 | 71.03 (27.48 -183.57) | <.001 |
an=8158 (2580), weighted (unweighted) denominators
bIndividuals with missing data are not shown; this was <5% for all variables, except for income and condom use with most recent partner (not available for 42%).
cAll data have been weighted to match the Australian population.
dAdjusted for age group, income, and numbers of sexual partners in the last year.
eN/A: not applicable.
fToo few responses for analysis (n<15).
gAccessibility/Remoteness Index of Australia.
h≥14 standard drinks per week (for women).
iSTI: sexually transmissible infection.