Table 4.

Association of BMI with total, ischemic, and hemorrhagic stroke by age using Cox regression analysis.

Subtypes	<65 years				≥65 years
	Underweight	Normal	Overweight	Obesity	Underweight	Normal	Overweight	Obesity
Total stroke
Case (n = 638)	15	279	151	38	9	111	32	3
Adjusted HR (95%CI)	1.43 (0.85, 2.40)	1.0	1.68 (1.37, 2.07)*	2.33 (1.63, 3.33)*	0.67 (0.34, 1.33)	1.0	1.00 (0.67, 1.49)	0.66 (0.20, 2.18)
P-value	0.184		<0.001	<0.001	0.249		0.989	0.495
Ischemic stroke
Case (n = 404)	10	210	96	30	5	36	17	0
Adjusted HR (95%CI)	1.23 (0.65, 2.34)	1.0	1.39 (1.08, 1.78)*	2.34 (1.56, 3.50)*	1.06 (0.41, 2.71)	1.0	1.61 (0.89, 2.90)	0.00 (0.00, 2.94)
P-value	0.518		0.010	<0.001	0.910		0.113	0.844
Hemorrhagic stroke
Case (n = 121)	5	47	40	5	1	18	5	0
Adjusted HR (95%CI)	2.97 (1.17, 7.54)*	1.0	3.02 (1.95, 4.69)*	2.34 (0.90, 6.06)	0.51 (0.67, 3.8)	1.0	1.01 (0.37, 2.76)	0.00 (0.00, 2.40)
P-value	0.022		<0.001	0.081	0.512		0.990	0.907

^*P < 0.05.