| Primiparous | Multiparous | ||||||
---|---|---|---|---|---|---|---|---|
 | 14-17 years | 18-19 years | 14-17 years | 18-19 years | ||||
Outcomes | Not adjusted for smokinga | Adjusted for smokingb | Not adjusted for smokinga | Adjusted for smokingb | Not adjusted for smokinga | Adjusted for smokingb | Not adjusted for smokinga | Adjusted for smokingb |
Birthweight estimates in grams | -28(-59, 3) | 4(-27, 35) | -37(-58, -15) | -11(-32, 11) | -77(-137, -16) | -72(-132, -13) | -56(-83, -29) | -34(-61, -6) |
Preterm birth OR | 1.09(0.59, 2.02) | 1.08(0.58, 2.00) | 1.08(0.79, 1.47) | 1.03(0.76, 1.41) | 1.85(1.34, 2.56) | 1.76(1.27, 2.44) | 1.36(1.07, 1.73) | 1.29(1.01, 1.65) |