Table 3.

Per-Unit Increase of paternal age and Risks of SGA and LGA by preterm and full-term birth group.

	Very early preterm birth: <34 w (n = 688)	Late preterm birth: 34–36w (n = 3,017)	Full-term birth: ≥37 w (n = 66,259)
SGA
n (%)	78 (11.30)	71 (2.40)	1,111 (1.70)
OR (95%CI)	1.01 (0.96 to 1.05)	1.03 (0.98 to 1.07)	0.97 (0.96 to 0.98)
Adjusted OR (95%CI)	0.96 (0.90 to 1.03)	1.07 (1.01 to 1.13)	0.99 (0.97 to 1.00)
LGA
n (%)	142 (20.60)	412 (13.70)	11,755 (17.70)
OR (95%CI)	0.99 (0.96 to 1.03)	1.01 (0.99 to 1.03)	1.03 (1.03 to 1.04)
Adjusted OR (95%CI)	0.99 (0.94 to 1.05)	1.00 (0.96 to 1.03)	1.01 (1.01 to 1.02)

Adjusted for maternal age, BMI, ethnicity, education level and marital status; per-unit increase are considered as one year increase in paternal age.