Table 2. Hazard Ratios and 95% Confidence Intervals for All-Cause Mortality by PR Interval and QRS Axis
PR interval QRS axis HR (95% CI) HR (95% CI) HR (95% CI)
Model 1† Model 2‡ Model 3§
Normal >37° 0.71 (0.67-0.77) 1.03 (0.96-1.11) 1.05 (0.97-1.13)
Normal ≤37° 1 (Ref.) 1 (Ref.) 1 (Ref.)
Prolonged >37° 0.89 (0.73-1.09) 0.79 (0.65-0.97) 0.80 (0.65-0.98)
Prolonged ≤37° 1.82 (1.59-2.08) 1.21 (1.05-1.39) 1.20 (1.04-1.39)
†Model 1: Unadjusted. †Model 1: Unadjusted. †Model 1: Unadjusted. †Model 1: Unadjusted. †Model 1: Unadjusted.
‡Model 2: Adjusted for age, sex, race, income, smoke status and BMI. ‡Model 2: Adjusted for age, sex, race, income, smoke status and BMI. ‡Model 2: Adjusted for age, sex, race, income, smoke status and BMI. ‡Model 2: Adjusted for age, sex, race, income, smoke status and BMI. ‡Model 2: Adjusted for age, sex, race, income, smoke status and BMI.
§Model 3: Adjustment for age, sex, race, income, smoke status, BMI, diabetes mellitus, family history of CVD, antihypertensive medications use, AV nodal drug use, cancer, HDL cholesterol, heart rate, diastolic blood pressure, systolic blood pressure, QRS duration, P-wave duration, corrected QT interval, Negative P-wave V1. §Model 3: Adjustment for age, sex, race, income, smoke status, BMI, diabetes mellitus, family history of CVD, antihypertensive medications use, AV nodal drug use, cancer, HDL cholesterol, heart rate, diastolic blood pressure, systolic blood pressure, QRS duration, P-wave duration, corrected QT interval, Negative P-wave V1. §Model 3: Adjustment for age, sex, race, income, smoke status, BMI, diabetes mellitus, family history of CVD, antihypertensive medications use, AV nodal drug use, cancer, HDL cholesterol, heart rate, diastolic blood pressure, systolic blood pressure, QRS duration, P-wave duration, corrected QT interval, Negative P-wave V1. §Model 3: Adjustment for age, sex, race, income, smoke status, BMI, diabetes mellitus, family history of CVD, antihypertensive medications use, AV nodal drug use, cancer, HDL cholesterol, heart rate, diastolic blood pressure, systolic blood pressure, QRS duration, P-wave duration, corrected QT interval, Negative P-wave V1. §Model 3: Adjustment for age, sex, race, income, smoke status, BMI, diabetes mellitus, family history of CVD, antihypertensive medications use, AV nodal drug use, cancer, HDL cholesterol, heart rate, diastolic blood pressure, systolic blood pressure, QRS duration, P-wave duration, corrected QT interval, Negative P-wave V1.