Table 5.

Hazard ratios (with 95% confidence intervals) and numbers of cases for stroke by category of birth weight and updated adult body mass index, adjusted for age and updated smoking status, nurses' health study, 1976-2000

	Adult BMI centile
Birth weight in kg (centile)	<11th	11th-42nd	43rd-87th	≥87th	Hazard ratio per unit BMI
<2.50 (<11th)	1.35 (11)	1.06 (19)	1.34 (45)	1.96 (19)	1.05 (1.01 to 1.09)
2.50≤3.18 (11th≤42nd)	0.88 (31)	1.07 (101)	1.27 (193)	1.30 (53)	1.03 (1.00 to 1.05)
3.19≤3.86 (43rd≤87th)	0.78 (35)	0.81 (106)	1.00* (243)	1.54 (116)	1.05 (1.04 to 1.07)
≥3.87 (≥87th)	0.98 (14)	0.79 (31)	0.89 (75)	1.30 (38)	1.04 (1.01 to 1.07)
Hazard ratio per kg birth weight	0.83 (0.55 to 1.24)	0.79 (0.62 to 0.99)	0.79 (0.68 to 0.92)	0.99 (0.78 to 1.26)	—

BMI=body mass index.

^*Reference value.