Daily sedentary time and physical activity as assessed by accelerometry and their correlates in older adults

Table 3 Hierarchical regression analysis of correlates of sedentary time^a in 1201 LASA participants

	Block 1			Block 2			Block 3
	β	SE	P-value	β	SE	P-value	β	SE	P-value
Demographic factors
Age ≤ 65 years (ref)	0.0			0.0			0.0
Age 65–70 years	1.6	0.7	0.019	1.9	0.7	0.006	1.5	0.7	0.029
Age 70–75 years	2.4	0.8	0.004	2.8	0.8	0.001	2.0	0.8	0.004
Age 75–80 years	4.2	0.9	< 0.001	4.5	0.9	< 0.001	3.7	0.8	< 0.001
Age ≥ 80 years	11.4	0.9	< 0.001	12.0	0.9	< 0.001	8.9	0.9	< 0.001
Men (ref)	0.0			0.0			0.0
Women	−2.5	0.5	< 0.001	−2.0	0.5	< 0.001	−2.6	0.5	< 0.001
Education low	−1.8	0.7	0.007	−2.4	0.7	0.001	−2.4	0.6	< 0.001
Education medium	−0.3	0.7	0.658	−0.7	0.6	0.268	−1.3	0.6	0.036
Education high (ref)	0.0			0.0			0.0
Spring (ref)	0.0			0.0			0.0
Summer	−0.5	0.8	0.519	−0.4	0.8	0.608	−0.6	0.7	0.410
Autumn	1.3	0.7	0.073	1.6	0.8	0.031	1.6	0.7	0.025
Winter	2.4	0.7	0.001	2.4	0.7	0.001	2.3	0.7	0.001
Lifestyle factors
Never smoker (ref)				0.0			0.0
Former smoker				−0.5	0.6	0.367	−0.4	0.6	0.446
Current smoker				2.6	0.9	0.006	1.8	0.9	0.042
BMI category underweight				−0.6	0.8	0.440	0.2	0.7	0.840
BMI category normal weight (ref)				0.0			0.0
BMI category overweight				8.0	2.6	0.002	6.6	2.4	0.008
BMI category obese				8.5	1.6	< 0.001	6.3	1.6	< 0.001
Urbanization low (ref)				0.0			0.0
Urbanization intermediate				−0.2	0.5	0.703	0.1	0.5	0.888
Urban high				−5.0	2.5	0.046	−4.3	2.4	0.072
Health and function factors
Duration 6 m walk test (s)							0.5	0.1	< 0.001
No functional limitation (ref)							0.0
≥ l functional limitation							1.7	0.6	0.008
Bicycling (yes)							−0.9	0.2	< 0.001
Self-rated health poor/fair							2.6	0.6	< 0.001
Self-rated health good/excellent (ref)							0.0
Explained variance (R²)	0.166		< 0.001	0.207		< 0.001	0.288		< 0.001

^aExpressed as percentage of total wear time. Ref: Reference. Lower values imply less time spent in sedentary
Unstandardized regression coefficients and standard errors (SE)
Consecutive blocks of correlates:
Block 1: age, sex, education and season;
Block 2 block 1 and smoking, BMI categories and urbanisation;
Block 3: block 2 and 6 m walk test, functional limitations, bicycling, and self-rated health
Living situation and number of chronic diseases were not significant correlates

ISSN: 1861-6909