Table 2.

Incidence rates and hazard ratios (95% confidence intervals) of hypertension according to hemoglobin A1c quintile

A1c Quintile	Cases	Crude Incidence Rate (cases/10,000 person-years)	Age Adjusted	Multivariable Model*	Multivariable Model + BMI
1 (< 4.78%)	1734	435.9	1.0	1.0	1.0
2 (4.78–4.92%)	1765	447.0	1.00 (0.93–1.07)	0.99 (0.92–1.06)	0.96 (0.89–1.03)
3 (4.92–5.04%)	1867	490.4	1.08 (1.01–1.16)	1.06 (0.99–1.13)	1.01 (0.95–1.09)
4 (5.04–5.19%)	1939	519.1	1.13 (1.06–1.20)	1.08 (1.01–1.16)	1.00 (0.93–1.07)
5 (≥ 5.19%)	2103	600.2	1.26 (1.18–1.34)	1.21 (1.13–1.30)	1.04 (0.97–1.12)
P for trend			<.0001	<.0001	0.10

^*Adjusted for age, smoking, alcohol consumption, physical activity, hormone use, high cholesterol, and parental history of myocardial infarction <60 years.