Adjusted odds ratios and 95% confidence intervals

VariableContrastOdds ratio (95% confidence interval)Test statistic
IVSDT (mm)12:101.13 (0.82–1.56)χ22 = 3.48, P = 0.176
LVESD (mm)35:281.38 (0.95–2.01)χ12 = 2.81, P = 0.094
LVEF (%)--χ22 = 8.02, P = 0.018
-46:610.34 (0.16–0.73)-
-69:611.07 (0.67–1.71)-
LVPWDT (mm)12:91.35 (0.83–2.20)χ12 = 1.43, P = 0.232
Aortic regurgitationMild to severe: none or trivial0.71 (0.39–1.28)χ12 = 1.32, P = 0.250
Mitral regurgitationMild to severe: none or trivial0.96 (0.58–1.58)χ12 = 0.03, P = 0.868
LVOT velocity (m/s)--χ22 = 8.20, P = 0.017
-0.9:1.10.51 (0.32–0.82)-
-1.4:1.11.20 (0.75–1.91)-
LV cardiac index [L/(min·m2)]3.6:2.61.05 (0.78–1.43)χ12 = 0.11, P = 0.742
MV E:e’16.7:8.61.42 (1.00–2.02)χ12 = 3.85, P = 0.050
AVSP velocity (m/s)1.7:1.21.08 (0.84–1.40)χ12 = 0.37, P = 0.543

For all continuous variables except LVOT and LVEF, the odds ratios represent an interquartile increase in that variable (i.e., an increase from the 25th to the 75th percentile). For LVOT and LVEF, which appear to be non-monotonically related to the outcome (see Figure 3), odds ratios are calculated at 2 data points compared with the median (i.e., 50th percentile) to represent the effects of having an extremely low value (10th percentile) and an extremely high value (90th percentile). As IVSDT, LVOT, and LVEF each showed evidence of nonlinearity, these variables were modeled with regression splines, and their overall tests of the association are based on 2 degrees of freedom. -: no data. IVSDT: interventricular septum diastolic thickness; LVOT: left ventricular outflow tract; LV: left ventricular; LVESD: left ventricular end-systolic dimension; LVPWDT: left ventricular posterior wall diastolic thickness; MV: mitral valve; AVSP: aortic valve systolic peak; LVEF: left ventricular ejection fraction