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

Outcome	LGA according to Canadian curve				LGA according to world region–specific curves
	Nonimmigrants n = 72 955	Immigrants n = 17 684	Immigrants v. nonimmigrants		Immigrants 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
Death	96 (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 d	2 481 (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 NICU	10 470 (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 ventilation	2 243 (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 trauma	1 986 (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 laceration	2 454 (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 dystocia	6 401 (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 hemorrhage	4 181 (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.