Associations of sedentary behavior and physical activity with older adults’ physical function: an isotemporal substitution approach

Table 4 Isotemporal Substitution Models Examining the Associations of Replacing SB, LIPA, and MVPA on Physical Function

	SB		LIPA		MVPA
	β	95%CI	β	95%CI	β	95%CI
Hand grip strength
Replace SB with	Dropped		0.054	(−0.030, 0.138)	0.066	(−0.164, 0.296)
Replace LIPA with	−0.054	(−0.139, 0.030)	Dropped		0.011	(−0.247, 0.270)
Usual gait speed
Replace SB with	Dropped		0.000	(−0.003, 0.003)	0.018	(0.011, 0.026) ***
Replace LIPA with	0.000	(−0.003, 0.003)	Dropped		0.018	(0.010, 0.027) **
Maximum gait speed
Replace SB with	Dropped		0.000	(−0.003, 0.004)	0.025	(0.016, 0.034) ***
Replace LIPA with	0.000	(−0.004, 0.003)	Dropped		0.025	(0.014, 0.035)***
Time up and go
Replace SB with	Dropped		−0.003	(−0.018, 0.011)	−0.113	(−0.152, −0.074) ***
Replace LIPA with	0.003	(−0.011, 0.018)	Dropped		−0.110	(−0.154, −0.066) ***
One-legged stance with eyes open
Replace SB with	Dropped		0.066	(−0.204, 0.355)	1.156	(0.418, 1.894) **
Replace LIPA with	−0.067	(−0.337, 0.203)	Dropped		1.088	(0.259, 1.917)**

Note. * p < .05, **p < .01, ***p < .001. SB = sedentary behavior, LIPA = light-intensity physical activity, MVPA = moderate- to vigorous-intensity physical activity. Regression coefficients correspond to a 10-min increment of each activity
Adjusted for age (years), sex, BMI (kg/m2), the number of past illnesses, complications and comorbidity, smoking status (current smoker/never smoked, past smoker), drinking status (current drinker/non-drinker, past drinker), residence status (living alone/living with someone), highest educational attainment (up to and including high school / university, junior college, vocational school, or higher degree), and total wear time

ISSN: 1471-2318