Table 5. Odds ratio estimates of effect of baseline characteristics on latent contraceptive status membership at Time 1 (2006), with short-acting contraceptive methods with condoms selected as the default/reference contraceptive status.
| Natural with other | Condom with natural | Sterilisation with other | LARCs | None | ||
|---|---|---|---|---|---|---|
| Baseline characteristic (in 2006) | N (%)* | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
| ABUSE | ||||||
| Intimate partner violence (IPV) | ||||||
| No | 3917 (72.7%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 1291 (24.0%) | 1.17 (1.01, 1.38) | 1.19 (0.91, 1.48) | 1.57 (1.19, 2.03) | 1.52 (1.15, 2.00) | 1.12 (0.88, 1.45) |
| DEMOGRAPHICS | ||||||
| Age at baseline (years) | 1.10 (1.06, 1.15) | 1.29 (1.20, 1.38) | 1.44 (1.31, 1.55) | 1.13 (1.04, 1.22) | 1.19 (1.11, 1.28) | |
| Highest qualification | ||||||
| No formal qualifications | 1382 (25.7%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| School/higher school cert. | 1460 (27.1%) | 1.08 (0.89, 1.29) | 0.98 (0.74, 1.29) | 0.62 (0.46, 0.84) | 0.97 (0.71, 1.33) | 0.92 (0.67, 1.25) |
| Trade/apprentice/cert./diploma | 1729 (32.1%) | 1.18 (0.99, 1.40) | 0.53 (0.39, 0.70) | 0.18 (0.11, 0.25) | 0.62 (0.44, 0.87) | 0.61 (0.44, 0.87) |
| University/higher degree | 804 (14.9%) | 1.18 (0.97, 1.46) | 0.70 (0.47, 1.02) | 0.13 (0.05, 0.20) | 0.56 (0.34, 0.83) | 0.76 (0.52, 1.07) |
| Area of residence | ||||||
| Major cities | 2976 (55.2%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Regional | 2150 (39.9%) | 0.78 (0.67, 0.90) | 1.80 (1.42, 2.24) | 3.01 (2.32, 3.94) | 1.51 (1.17, 1.95) | 0.90 (0.71, 1.14) |
| Remote | 184 (3.4%) | 0.71 (0.46, 1.12) | 1.93 (1.07, 3.17) | 3.90 (1.84, 6.19) | 1.21 (0.44, 2.17) | 1.17 (0.54, 1.98) |
| Current relationship status | ||||||
| Partnered | 4500 (83.5%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Unpartnered | 874 (16.2%) | 0.80 (0.67, 0.95) | 0.48 (0.33, 0.64) | 0.23 (0.13, 0.39) | 0.84 (0.57, 1.18) | 0.57 (0.43, 0.77) |
| Work status | ||||||
| Not in paid work | 1175 (21.8%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Part-time | 1644 (30.5%) | 0.65 (0.54, 0.78) | 0.82 (0.63, 1.08) | 0.81 (0.59, 1.13) | 0.80 (0.55, 1.16) | 0.51 (0.38, 0.71) |
| Full-time | 2564 (47.6%) | 0.49 (0.40, 0.58) | 0.29 (0.22, 0.39) | 0.20 (0.14, 0.27) | 0.43 (0.30, 0.59) | 0.26 (0.20, 0.34) |
| HEALTH BEHAVIOURS | ||||||
| Smoking status | ||||||
| Non-smoker | 3099 (57.5%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Ex-smoker | 1179 (21.9%) | 1.19 (1.00, 1.40) | 1.15 (0.87, 1.54) | 1.47 (1.06, 2.00) | 1.11 (0.76, 1.46) | 1.33 (1.01, 1.84) |
| Current smoker | 1087 (20.2%) | 0.94 (0.80, 1.12) | 1.44 (1.09, 1.88) | 1.47 (1.05, 2.01) | 1.24 (0.87, 1.68) | 1.36 (1.00, 1.82) |
| Alcohol consumption | ||||||
| Low risk drinker | 3357 (62.3%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Non-drinker | 453 (8.4%) | 1.55 (1.21, 1.97) | 2.19 (1.53, 3.10) | 1.51 (0.90, 2.42) | 1.77 (1.09, 2.57) | 2.63 (1.77, 3.81) |
| Rarely drinks | 1345 (25.0%) | 1.09 (0.93, 1.29) | 1.42 (1.08, 1.79) | 1.57 (1.15, 2.06) | 1.04 (0.72, 1.38) | 1.75 (1.33, 2.22) |
| Risky/high risk drinker | 203 (3.8%) | 0.80 (0.57, 1.16) | 1.29 (0.65, 2.12) | 1.14 (0.52, 1.97) | 1.39 (0.67, 2.35) | 1.29 (0.62, 2.13) |
| Body mass index | ||||||
| Healthy/underweight | 3169 (58.8%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Overweight | 1273 (23.6%) | 1.02 (0.87, 1.19) | 0.97 (0.71, 1.25) | 1.41 (1.02, 1.84) | 1.61 (1.21, 2.13) | 1.27 (0.93, 1.65) |
| Obese | 822 (15.3%) | 0.99 (0.81, 1.17) | 1.59 (1.14, 2.03) | 2.41 (1.69, 3.27) | 1.61 (1.13, 2.24) | 1.56 (1.12, 2.06) |
| Ever used illicit drugs | ||||||
| No | 2045 (38.0%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 3297 (61.2%) | 1.10 (0.96, 1.26) | 1.02 (0.82, 1.28) | 0.73 (0.55, 0.94) | 0.96 (0.76, 1.24) | 1.29 (1.03, 1.68) |
| Poor mental health | ||||||
| No | 2999 (55.7%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 2383 (44.2%) | 1.08 (0.95, 1.24) | 1.10 (0.87, 1.35) | 1.18 (0.91, 1.48) | 1.19 (0.93, 1.59) | 0.90 (0.71, 1.13) |
| REPRODUCTIVE FACTORS | ||||||
| Ever been pregnant | ||||||
| No | 2993 (55.6%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 2388 (44.3%) | 1.60 (1.40, 1.83) | 0.71 (0.55, 0.93) | 0.18 (0.12, 0.26) | 0.85 (0.65, 1.09) | 2.67 (2.05, 3.44) |
| Ever had a pregnancy termination | ||||||
| No | 4510 (83.7%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 874 (16.2%) | 1.13 (0.94, 1.38) | 1.58 (1.20, 2.15) | 1.28 (0.90, 1.76) | 1.14 (0.79, 1.57) | 1.46 (1.09, 1.95) |
| HEALTH SERVICE USE | ||||||
| Health care card | ||||||
| No | 4687 (87.0%) | Ref. | Ref. | Ref. | Ref. | Ref. |
| Yes | 697 (12.9%) | 1.21 (0.97, 1.48) | 2.05 (1.43, 2.69) | 2.21 (1.51, 3.02) | 2.55 (1.79, 3.36) | 1.36 (0.96, 1.90) |
* Note that column percentages may not add to 100% due to missing values (not shown); parity was not included due to collinearity with pregnancy history. LARC = Long-acting reversible contraceptives.