The association between objectively-measured activity, sleep, call responsibilities, and burnout in a resident cohort

Table 3 Association between self-reported burnout and activity levels

	Daily mean ± SE across all study periods		Difference (95% CI) between burnout groups	P-value^a
Activity measure	No burnout	Burnout
Exercise HR Zone^b, min	142 ± 16	120 ± 13	−22 (−50 to 6)	0.12
Active Time^c, min	40 ± 6	40 ± 7	−0.1 (−13 to 13)	0.99
Steps	9690 ± 380	9833 ± 482	143 (− 694 to 980)	0.74

^aThe mean activity level was modeled as a function of burnout category, study period, treatment group, sex, and body mass index using a linear generalized estimating equation (GEE) model. An exchangeable working correlation structure was specified to account for correlation between repeated activity measurements over time. The GEE model was used to estimate the mean difference in activity level between those with and without burnout over follow-up
^bExercise heart rate zone was defined as a combination of time in ‘fat burning’, ‘cardio’, and ‘peak’ heart rate zones, as measured and reported by the Fitbit Charge HR™ app
^cActive time was defined as a combination of ‘fairly active minutes’ and ‘very active minutes’, as measured and reported by the Fitbit Charge HR™ app
Abbreviations: CI, 95% confidence interval; HR, heart rate; min, minutes; SE, standard error

ISSN: 1472-6920