Table 3.
Predicted probabilities and adjusted Absolute Risk Differences in preterm birth (and 95% confidence intervals) between neighborhood deprivation tertiles by immigrant status and immigrants’ duration of residence, singleton live births, urban Ontario, 2002–2007
| Predicted preterm birthc by neighborhood deprivation | Absolute risk differencec | Absolute risk differencec | |||
|---|---|---|---|---|---|
| Med vs. low deprivation | High vs. low deprivation | ||||
| Low | Med | High | [95% CI] | [95% CI] | |
| Model 1 | |||||
| Canadian-borna | 5.7 | 6.1 | 7.0 | 0.46 [0.26, 0.66] | 1.34 [1.11, 1.57] |
| Model 3 | |||||
| Interaction model for immigrants [duration groupsa deprivation tertiles]b | |||||
| <5 years | 4.5 | 5.0 | 4.7 | 0.50 [−0.44, 1.44] | 0.20 [−0.59, 1.00] |
| 5–9 years | 5.4 | 5.1 | 6.0 | −0.30 [−0.93, 0.34] | 0.58 [−0.03, 1.20] |
| 10–14 years | 6.5 | 6.5 | 6.8 | 0.04 [−0.79, 0.87] | 0.31 [−0.46, 1.08] |
| ≥15 years | 6.3 | 8.0 | 8.1 | 1.72 [0.57, 2.87] | 1.86 [0.68, 2.98] |
aTwo-level model. Adjusted ARDs were calculated for mostly Canadian-born multiparous women aged 30–34 years who gave birth to female infants
bCross-classified model including a product term between duration groups and deprivation tertiles. Adjusted ARDs were calculated for immigrant multiparous women aged 30–34 years who gave birth to female infants, immigrated under the family class, were married or common law, had knowledge of English or French, graduated from high school, and were born in industrialized countries
cPredicted probabilities of preterm birth and absolute risk differences are expressed in percents