Table 2.

Association of SAI QRST with CRT response.

Predictor=SAI QRST tertiles	Odds Ratio (95%CI) (Tertile 3 vs. Tertiles 1 & 2)	P	AIC*
Model 1 (unadjusted)	2.18 (1.25, 3.79)	0.011	319.26
Model 2 (adjusted by age, sex)	2.33 (1.32, 4.11)	0.005	315.02
Model 3 (model 2 + by cardiomyopathy type)	2.21 (1.25, 3.93)	0.007	311.17
Model 4 (model 2 + LVEF)	2.23 (1.26, 3.95)	0.006	314.57
Model 5 (model 2 + BBB morphology, QRS)	2.00 (1.10, 3.62)	0.023	307.23
Model 6 (model 2 + renal function)	2.33 (1.32, 4.11)	0.003	316.92
Model 7 (model 2 + sodium)	2.26 (1.28, 4.00)	0.005	312.98
Model 8 (model 2+ LVEF, CM type, QRS, BBB morph, renal function, Na)	1.86 (1.02, 3.41)	0.044	307.01
Model 9 (model 2+ LVEF, CM type, QRS, BBB morph, LV lead position (RAO and LAO))	1.71 (0.92, 3.17)	0.087	306.44
FINAL MODEL, (model 2+ LVEF, CM type, QRS, BBB morph)	1.87 (1.03, 3.42)	0.041	306.06

^*Smaller AIC indicates better model fit