Table 2 Adjusted a effect of various exposure variables on birth weight in the regional (Oppland county) cohort
Births 1989-2010b (n = 31070) | Births 2001-2010c (n = 13548) | Homogeneous subseti 2001-2010c(n = 4136) | |
|---|---|---|---|
Predictors d | B e , grams (95% CI) | B e , grams (95% CI) | B e , grams (95% CI) |
Year of delivery (per year) | −1 f (−2, 0) | −7 (−4, -9) | −5 (−9, -1) |
Mother’s age (per year) | −1 (−2, 0) | −1 (−3, 0) | −1 (−4, 2) |
Mother’s height (per 1 cm) | nag | 13 (12, 14) | 13 (11, 15) |
Pre-pregnancy BMIh (per kg/m3) | nag | 22 (21, 24) | 26 (19, 32) |
Gestational weight gain (per kg) | nag | 18 (17, 19) | 19 (16, 21) |
Gestational age (per day) | 25 (24, 25) | 22 (21, 23) | 22 (20, 23) |
Male sex | 104 (96, 115) | 99 (86, 112) | 78 (56, 100) |
Multiparity | 167 (156, 178) | 181 (166, 195) | 179 (155, 204) |
Smoking | −171 (−183, -159) | −180 (−199, -160) | naj |
Preeclampsia | −31 (−56, -6) | −81 (−113, -49) | naj |
Diabetes | 371 (326, 417) | 298 (246, 350) | naj |
Thromboembolism | −60 (−119, -1) | −97 (−155, -39) | naj |
Prior premature birth | −96 (−141, -51) | −79 (−131, -27) | −81 (−169, 7) |
Prior caesarean section | 32 (10, 55) | 39 (10, 67) | −94 (−171, -17) |
Anaemia | 82 (55, 110) | 106 (77, 135) | 97 (41, 152) |
Oligohydramnion | −265 (−292, -238) | −257 (−284, -229) | −245 (−306, -184) |
Polyhydramnion | 299 (251, 347) | 255 (205, 304) | 282 (177, 386) |