Table 2.

All-Cause Mortality Hazard Ratios for DFA Scaling Exponent

MVPA Cut-point	Model	Adj HR	95% CI	p Value	AIC	c-statistic
MVPA1	1a	0.6	0.48–0.75	<.0001	3,556.7	0.721
	2b	0.73	0.60–0.89	<.01	3,520.0	0.739
	3c	0.75	0.62–0.92	<.01	3,494.7	0.749
	4d	0.76	0.62–0.92	<.01	3,495.4	0.749
	5e,f	0.75	0.59–0.97	.03	684.2	0.77
MVPA2	1a	0.6	0.48–0.75	<.0001	3,556.7	0.721
	2b	0.66	0.53–0.83	<.001	3,545.0	0.733
	3c	0.67	0.54–0.84	<.01	3,517.3	0.741
	4d	0.68	0.54–0.85	<.01	3,517.9	0.742
	5e,f	0.64	0.49–0.82	<.01	680.5	0.784

Notes: MVPA quartiles are calculated within each age category. Two accelerometer thresholds were used to account for time spent in MVPA: 760 CPM for MVPA₁, and 2020 CPM for MVPA₂.

AIC = Akaike Information Criterion; CI = Confidence interval; DFA = Detrended fluctuation analysis; MVPA = Moderate-to-vigorous physical activity.

^aControlling for age. ^bControlling for age and MVPA quartile. ^cControlling for age, MVPA quartile, and chronic conditions. ^dControlling for age, MVPA quartile, chronic conditions, and weartime. ^eControlling for age, MVPA quartile, chronic conditions, weartime, sex, marital status, education, difficulty walking, hypertension, and total cholesterol. ^f2,069 individuals with missing information on at least one of the variables.