Table 1.

Regression analyses for power of RSA

F-test for nonconstant model
F-test	F = 1.09	F# = 3.077	P = 0.355

	Estimated coefficients of linear regression model
	Estimate	SE	t-Statistic	P
Intercept	0.0697	0.0430	1.621	0.108
Age	−0.0021	0.0023	−0.934	0.353
BMI	0.0022	0.0024	0.900	0.370
Sex	−0.0342	0.0215	−1.590	0.115

Lilliefors test for non-normality of residuals
Lilliefors test	D = 0.2510	D# = 0.0819	P = 0**

Respiratory sinus arrhythmia (RSA) power is independent of age, body mass index (BMI), and sex. F^#, critical value for significance of F-statistic; D^#, threshold value to reject the null hypothesis of D-statistic of Lilliefors test.

^**P < 0.01 (highly significant).