Table 3. Hazard Ratios and 95% Confidence Intervals for
All-Cause Mortality by QRS Axis
Population |
Normal PR interval |
Prolonged PR
interval |
Prolonged PR interval |
P for
interaction |
|
|
QRS axis >37° |
QRS axis ≤37° |
|
Total |
1 (Ref.) |
0.78 (0.64-0.95) |
1.18 (1.03-1.36) |
|
Sensitivity analysis |
|
|
|
|
P/PR ratio <0.7 |
1 (Ref.) |
0.77 (0.62-0.95) |
1.18
(1.00-1.38) |
|
Exclude events within the 1st year |
1 (Ref.) |
0.77 (0.63-0.95) |
1.18
(1.02-1.36) |
|
Exclude patients taking AV node drugs |
1 (Ref.) |
0.79 (0.63-0.97) |
1.23 (1.05-1.43) |
|
Subgroup analysis |
|
|
|
|
Sex |
|
|
|
0.434 |
Men |
1 (Ref.) |
0.81 (0.62-1.04) |
1.22 (1.01-1.47) |
|
Women |
1 (Ref.) |
0.72 (0.52-1.00) |
1.09 (0.87-1.36) |
|
Race |
|
|
|
0.156 |
Whites |
1 (Ref.) |
0.85 (0.67-1.08) |
1.22 (1.04-1.45) |
|
Others |
1 (Ref.) |
0.66 (0.46-0.94) |
1.11 (0.84-1.46) |
|
Age |
|
|
|
0.489 |
<50 |
1 (Ref.) |
0.87 (0.46-1.65) |
1.23 (0.62-1.65) |
|
≥50 |
1 (Ref.) |
0.78 (0.63-0.96) |
1.17 (1.01-1.35) |
|
Diabetes mellitus |
|
|
|
0.406 |
Yes |
1 (Ref.) |
0.93 (0.52-1.66) |
1.21 (0.81-1.79) |
|
No |
1 (Ref.) |
0.75 (0.61-0.93) |
1.20 (1.03-1.40) |
|
Antihypertensive medications use |
|
|
|
0.189 |
Yes |
1 (Ref.) |
0.83 (0.62-1.12) |
1.09 (0.89-1.35) |
|
No |
1 (Ref.) |
0.74 (0.56-0.97) |
1.31 (1.08-1.60) |
|