Table 2.

Among subjects with an incident elevated BP^a at the model derivation site, multivariate analyses of factors associated with meeting the study definition of hypertension.

Characteristic	Adjustedb,c hazard ratios (95% CI)	P value
Age in years	1.10 (1.05, 1.16)	<0.001
Sex
Male	1.40 (1.01, 1.95)	0.044
Female	1.00 (Ref)
Race
Non-white	1.00 (0.72, 1.39)	0.99
White	1.00 (Ref)
Normotensive BP immediately preceding incident elevated BP
Yes	1.00 (Ref)	0.045
No	1.39 (1.01, 1.93)
BMI percentiled	NA	NA
Systolic BP percentiled	NA	NA
Diastolic BP percentiled	NA	NA
Clinical setting of incident elevated BP
Primary care, well-child care	1.00 (Ref)
Primary care, non-well-child care	1.01 (0.66, 1.55)	0.949
Medical and surgical specialty	1.32 (0.84, 2.10)	0.231

CI indicates confidence interval; BP, blood pressure; BMI, body mass index; NA, not applicable; Ref, referent.

^aIncident elevated BP defined as systolic and/or diastolic BP ≥ 95^th percentile for age, height, and sex.

^bMultivariate Cox proportional hazards regression analyses, adjusted for age, sex, race, BP preceding incident elevated BP, BMI percentile, systolic BP percentile, diastolic BP percentile, and clinical setting of incident BP measurement.

^cAsthma, diabetes, census tract median income, and census tract education were not associated with hypertension and were excluded from the final model.

^dBMI percentile, systolic BP percentile, and diastolic BP percentile were modeled using splines; this method does not produce a summary hazard ratio and confidence interval for each unit increase.