Table 4.1.

The impact of trait anxiety, change in perceived stress, and their interaction on vagal recovery score (before and after adjusting for respiratory rate)

Predictor		Before adjusting for respiratory rate				After adjusting for respiratory rate
		Unstandardized estimate (b)	Standard error	Standardized estimate (Beta)	p	Unstandardize d estimate (b)	Standar d error	Standardized estimate (Beta)	p
Trait anxiety		−.003	.001	−.123	.010	−.005	.002	−.097	.014
Change in perceived stress		−.030	.016	−.191	.062	−.041	.026	−.135	.116
Trait anxiety x Change in perceived stress		.001	.0004	.253	.013	.001	.001	.177	.037
Vagal reactivity		.606	.021	.706	.000	.747	.019	.796	.000
Perceived stress during the baseline		.010	.006	.058	.094	.000	.010	−.001	.983
Perceived stress during the tasks (averaged)		−.0006	.007	−.004	.929	.012	.011	.045	.272
Age		−.0003	.0007	−.015	.619	−.000	.001	.008	.737
Diseases/medications		.013	.015	.023	.376	−.031	.024	−.028	.190
BMI		−.002	.001	−.040	.111	−.002	.002	−.024	.248
Sex		−.013	.019	−.027	.483	.030	.031	.031	.336
Menopausal status (women) a	peri-menopausal	.018	.032	.015	.580	.088	.052	.038	.087
	post- menopausal	−.008	.021	−.016	.687	−.017	.034	−.016	.620
Smoking status b	current smoker	−.004	.020	−.005	.836	−.083	.033	−.053	.011
	ex-smoker	.012	.013	.022	.387	−.026	.022	−.025	.242
Physical activity/ Exercise (hrs/week)	vigorous	−.00007	.002	−.001	.972	−.003	.003	−.016	.427
	moderate	−.0009	.001	−.022	.368	.000	.002	.002	.919
	light	.0008	.001	.015	.537	−.031	.024	.003	.872

^aNotes: Menopausal status was coded as a dummy variable: three categories (pre-, peri-, and post-menopausal; men coded as 0 on all the three categories), pre-menopausal is used a reference category.

^bSmoking status was coded as a dummy variable: three categories (never smoked, current smoker, ex-smoker), never smoked is used as a reference category.