Table 2.

Associations between birth weight and ability in school sports at 13 yr and participation in LTPA between 36 and 68 yr in the MRC NSHD (n = 2739).

	OR (95% CI) of Above Average or Average Ability in Sports vs Below Average Ability		OR (95% CI) of LTPA (at Least Once per Month) Across Adulthood vs No LTPA
	Model 1	Model 2	Model 1	Model 2	Model 3
Birth weight group (kg)
≤2.50	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)
2.51–3.00	1.97 (1.19–3.25)	1.91 (1.15–3.16)	1.74 (1.18–2.56)	1.50 (1.03–2.17)	1.40 (0.97–2.03)
3.01–3.50	2.01 (1.26–3.19)	1.91 (1.20–3.05)	2.14 (1.49–3.08)	1.82 (1.28–2.59)	1.69 (1.19–2.39)
3.51–4.00	1.82 (1.14–2.89)	1.66 (1.04–2.66)	1.84 (1.27–2.65)	1.52 (1.06–2.16)	1.43 (1.01–2.03)
>4.00	1.60 (0.95–2.72)	1.41 (0.82–2.42)	1.74 (1.15–2.63)	1.54 (1.03–2.30)	1.47 (0.98–2.19)

Model 1: adjusted for sex. Model 2: adjusted for sex, birth order, cognitive ability, and father’s occupational class. Model 3: same as model 2 plus additional adjustment for ability in school sports and physical health in adulthood. ≤2.50 kg: range = 1.25–2.50 kg (mean = 2.30 kg); >4.00 kg: range = 4.09–5.00 kg (mean = 4.32 kg).