Table 1.
Prevalence and predictors of unintended pregnancy based on a national survey of Canadian women (N=6,368)
| Sample Size | Unintended Pregnancy | Unadjusted Odds Ratio | Adjusted Odds Ratio | |
|---|---|---|---|---|
| Na | N (%) | OR (95% CI)b | OR (95% CI)b | |
| Age (years) | ||||
| <20 | 187 | 72.6 | 7.44 (4.75, 11.65) | 4.43 (2.59, 7.58) |
| 20-29 | 2945 | 29.8 | 1.20 (0.84, 1.69) | 1.19 (0.80, 1.76) |
| 30-39 | 3018 | 21.7 | 0.78 (0.55, 1.11) | 0.93 (0.63, 1.38) |
| ≥40 | 185 | 25.9 | 1 | 1 |
| Aboriginal Status | ||||
| Aboriginal | 264 | 46.1 | 2.41 (1.91, 3.04) | 1.29 (0.96, 1.73) |
| Non-Aboriginal | 6074 | 26.2 | 1 | 1 |
| Urban–rural residence | ||||
| Urban, population ≤499,999 | 2276 | 28.6 | 1.18 (1.00, 1.39) | 1.14 (0.95, 1.37) |
| Urban, population ≥500,000 | 2780 | 26.2 | 1.05 (0.89, 1.23) | 1.15 (0.96, 1.38) |
| Rural area | 1090 | 25.3 | 1 | 1 |
| Immigration to Canada | ||||
| Yes | 1397 | 27.7 | 1.04 (0.89, 1.21) | 1.53 (1.27, 1.83) |
| No | 4942 | 26.9 | 1 | 1 |
| Level of education | ||||
| High school or less | 1316 | 41.3 | 3.18 (2.49, 4.07) | 1.71 (1.28, 2.29) |
| Some postsecondary education | 2748 | 26.7 | 1.65 (1.30, 2.09) | 1.28 (0.99, 1.67) |
| Undergraduate education | 1620 | 19.2 | 1.07 (0.83, 1.38) | 1.05 (0.80, 1.37) |
| Graduate education | 622 | 18.1 | 1 | 1 |
| Partner/Significant other | ||||
| No | 525 | 61.5 | 5.06 (4.20, 6.11) | 3.20 (2.57, 3.99) |
| Yes | 5818 | 23.9 | 1 | 1 |
| Moms perceived health | ||||
| Poor/Fair | 334 | 42.4 | 2.29 (1.80, 2.90) | 1.57 (1.18, 2.09) |
| Good | 1415 | 32.2 | 1.48 (1.29, 1.69) | 1.23 (1.05, 1.45) |
| Excellent/very good | 4615 | 24.4 | 1 | 1 |
| Previous depression diagnosis | ||||
| Yes | 980 | 33.1 | 1.41 (1.21, 1.65) | 1.15 (0.97, 1.37) |
| No | 5367 | 26.0 | 1 | 1 |
| Pre-Pregnancy BMI (kg/m2) | ||||
| Underweight (<18.5) | 380 | 33.9 | 1 | 1 |
| Normal (≥18.5 & <25) | 3700 | 25.8 | 0.68 (0.54, 0.86) | 0.94 (0.72, 1.23) |
| Overweight (≥25 & <30) | 1314 | 26.8 | 0.72 (0.55, 0.93) | 0.98 (0.74, 1.32) |
| Obese (≥30) | 850 | 29.7 | 0.83 (0.63, 1.08) | 1.02 (0.75, 1.38) |
| Experienced violence within last 2 years | ||||
| Yes | 689 | 44.6 | 2.43 (2.07, 2.86) | 1.34 (1.10, 1.63) |
| No | 5644 | 24.9 | 1 | 1 |
| Number of past pregnancies | ||||
| 1 or more | 3453 | 27.6 | 1.06 (0.94, 1.19) | 1.33 (1.16, 1.52) |
| None | 2895 | 26.4 | 1 | 1 |
| Cigarette smoking before pregnancy | ||||
| Yes | 1399 | 40.0 | 2.18 (1.92, 2.47) | 1.34 (1.14, 1.57) |
| No | 4956 | 23.4 | 1 | 1 |
| Alcohol use before pregnancy | ||||
| Yes | 3964 | 27.5 | 1.06 (0.93, 1.20) | 1.17 (1.01, 1.35) |
| No | 2385 | 26.4 | 1 | 1 |
| Drug use before pregnancy | ||||
| Yes | 426 | 47.3 | 2.61 (2.12, 3.21) | 1.37 (1.05, 1.79) |
| No | 5927 | 25.6 | 1 | 1 |
aSample size is estimated using normalized weights
bOR and 95% CI were calculated using bootstrapping technique