Correlation between crown-rump length in the first trimester of pregnancy and neonatal outcomes

BMC Pediatrics

Table 4 Adjusted risk ratios for neonatal outcomes in CRL levels stratified by maternal BMI (n = 15 524)

BMI (kg/m²)	Statistic	Birth length	Birth weight	SGA	LGA	Preterm birth^a	Admission to NICU
BMI (kg/m²)	Statistic	Birth length	Birth weight	SGA	LGA	Preterm birth^a	Model 1	Model 2^b
< 18.5 (n = 2057)	Adjusted RR/ Effect size per SDS	0.17 ± 0.02	64.74 ± 7.62	0.689 (0.576–0.824)	1.281 (1.057–1.553)	1.477 (1.225–1.780)	0.991 (0.854–1.150)	1.019 (0.877–1.185)
< 18.5 (n = 2057)	P value	< .001	< .001	< .001	0.012	< .001	0.902	0.805
18.5–23.9 (n = 11,742)	Adjusted RR/ Effect size per SDS	0.14 ± 0.01	54.2 ± 3.28	0.761 (0.685–0.844)	1.260 (1.193–1.331)	1.053 (0.966–1.147)	0.914 (0.862–0.968)	0.918 (0.866–0.973)
18.5–23.9 (n = 11,742)	P value	< .001	< .001	< .001	< .001	0.243	0.002	0.004
≥ 24 (n = 1725)	Adjusted RR/ Effect size per SDS	0.13 ± 0.03	43.85 ± 8.72	0.679 (0.486–0.949)	1.149 (1.035–1.276)	0.934 (0.782–1.115)	0.940 (0.825–1.072)	0.943 (0.790–1.127)
≥ 24 (n = 1725)	P value	< .001	< .001	0.023	0.009	0.448	0.359	0.521

The models were adjusted for maternal age (category), gestational age (weeks), fetus sex, parity (category), mode of delivery
^aNot included gestational age
^bModel 2 was adjusted for compound factors in Model 1 and small for gestational age (SGA)

ISSN: 1471-2431