Table 3 Relationship of cardiac autonomic modulation with physical activity at domains of occupation and sport among Brazilian adults (n = 252).

	β	Occupational PA							β	Sport PA
		Unadjusted			β	Adjusted*				Unadjusted			β	Adjusted*
		95% CI	Adj.R²	p-value	β	95% CI	Adj.R²	p-value		95% CI	Adj.R²	p-value	β	95% CI	Adj.R²	p-value
SDNN (ms)	− 0.62	− 3.11; 1.85	− 0.003	0.619	− 0.64	− 2.68; 2.55	0.116	0.962	4.75^†	1.70; 7.81	0.032	0.002	3.26^†	0.18; 7.05	0.135	0.039
RMSSD (ms)	0.44	− 2.70; 2.79	− 0.004	0.975	0.48	− 2.39; 3.35	0.091	0.741	5.82	2.45–9.18	0.040	0.001	4.07	0.31; 7.85	0.111	0.034
LF (nu)	1.42	− 0.50; 3.34	0.004	0.148	2.39^†	0.24; 4.54	0.079	0.030	− 2.05	− 4.47; 0.35	0.007	0.094	1.26	− 4.16; 1.64	0.064	0.393
HF (nu)	− 0.94	− 2.89; 1.01	0.000	0.346	− 1.62	− 3.84; 0.60	0.062	0.151	1.85	− 0.59; 4.29	0.005	0.137	1.08	− 1.87; 4.04	0.054	0.470
SD1	0.0.9	− 2.17; 1.98	− 0.004	0.927	0.18	− 2.06; 2.43	0.075	0.871	4.12	1.57; 6.68	0.035	0.002	2.85	0.11; 5.81	0.091	0.049
SD2	− 0.91	− 4.08; 2.26	− 0.003	0.572	− 0.15	− 2.58; 3.27	0.104	0.929	5.40^†	1.49; 9.32	0.025	0.007	4.27	− 0.24; 8.78	0.119	0.063

Bold indicates domains that are statistically related to cardiac autonomic modulation.
PA Physical activity, CI Confidence interval, Adj.R² Adjusted R squared, SDNN Standard deviation of the mean of all normal RR intervals, RMSSD Square root of the square mean of the differences between adjacent normal RR intervals in a time interval, LF Low frequency, HF High frequency, SD1 Standard deviation of instantaneous beat-to-beat variability, SD2 Long-term standard deviation of continuous R-R intervals, ms milliseconds, nu normalized units.
*Adjusted by gender, age, socioeconomic level, body mass index.
^†Statistical model with significant interaction between gender × physical activity.

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