Table 4:

Adverse neonatal and obstetric outcomes among large-for-gestational-age (LGA) infants in nonimmigrant and immigrant groups according to whether weight classification was defined by the Canadian birth-weight curve or by world region–specific birth-weight curves

OutcomeLGA according to Canadian curveLGA according to world region–specific curves
Nonimmigrants
n = 72 955
Immigrants
n = 17 684
Immigrants v. nonimmigrantsImmigrants
n = 31 966
Immigrants v. nonimmigrants
No. of events (rate per 1000)No. of events (rate per 1000)Crude OR (95% CI)Adjusted OR* (95% CI)No. of events (rate per 1000)Crude OR (95% CI)Adjusted OR* (95% CI)
Neonatal
Death96 (1.3)26 (1.5)1.12 (0.72–1.72)1.10 (0.70–1.72)36 (1.1)0.86 (0.58–1.26)0.83 (0.56–1.24)
Hospital stay ≥ 7 d2 481 (34.0)626 (35.4)1.04 (0.95–1.14)0.97 (0.89–1.07)894 (28.0)0.82 (0.76–0.88)0.76 (0.71–0.83)
Admission to NICU10 470 (143.5)3 354 (189.7)1.40 (1.34–1.46)1.32 (1.27–1.38)5 263 (164.6)1.18 (1.14–1.22)1.11 (1.07–1.15)
Mechanical ventilation2 243 (30.7)528 (29.9)0.97 (0.88–1.07)0.94 (0.85–1.03)791 (24.7)0.80 (0.74–0.87)0.77 (0.71–0.84)
Birth trauma1 986 (27.2)462 (26.1)0.96 (0.87–1.06)0.95 (0.85–1.05)703 (22.0)0.80 (0.74–0.88)0.79 (0.72–0.86)
Obstetric
Third- or fourth-degree perineal laceration2 454 (33.6)776 (43.9)1.32 (1.21–1.43)1.41 (1.29–1.53)1 420 (44.4)1.34 (1.25–1.43)1.40 (1.31–1.50)
Shoulder dystocia6 401 (87.7)1 601 (90.5)1.04 (0.98–1.10)1.02 (0.96–1.08)2 312 (72.3)0.81 (0.77–0.85)0.79 (0.75–0.84)
Postpartum hemorrhage4 181 (57.3)854 (48.3)0.84 (0.77–0.90)0.87 (0.80–0.94)1 419 (44.4)0.76 (0.72–0.81)0.79 (0.74–0.84)
  • Note: CI = confidence interval, NICU = neonatal intensive care unit, OR = odds ratio.

  • * Adjusted for maternal age, parity, income quintile and year of delivery.