Table 4.

Association between BNP (independent) and strain (dependent variable)

Dependent Variable	Estimate [ β Coefficient (95% CI); P Value]*
	All Data (n = 460)	Pre-Op (n = 237)	After Repair† (n = 223)	Immediate Post-Op (n = 35)	Recovery (n = 188)
GLS	1.18 (0.82 to 1.55); <0.0001	0.39 (−0.38 to 1.16); 0.32	1.00 (0.50 to 1.49); 0.0001	1.61 (−0.49 to 3.72); 0.13	1.03 (0.50 to 1.57); 0.0003
FWS	1.27 (0.89 to 1.66); <0.0001	0.50 (−0.28 to 1.29); 0.21	0.73 (0.18 to 1.27); 0.0094	1.25 (−0.81 to 3.31); 0.22	0.62 (0.01 to 1.22); 0.047

Definition of abbreviations: 95% CI = 95% confidence interval; BNP = brain-type natriuretic peptide; FWS = free-wall strain GLS = global longitudinal strain; post-op = postoperative; pre-op = preoperative.

^*All P values are for comparisons among pre-op, immediate post-op, and recovery periods.

^†Includes both immediate post-op and recovery data.