Table 3. The association between activity measures and demographic and health factors in women (n=577); results from linear regression analyses.

		Acceleration (mg/day)		Sedentary time (h/day)		Light PA (min/day)		Moderate-vigorous PA (min/day)		Sleep time (accelerometer) (h/day)
Variable	n	β ± SE	p	β ± SE	p	β ± SE	p	β ± SE	p	β ± SE	p
Age-group
70-74	187	Referent		Referent		Referent		Referent		Referent
75-79	201	-1.51 ± 0.52	0.003	0.06 ± 0.13	0.61	-1.78 ± 3.07	0.56	-7.28 ± 2.35	0.002	0.04 ± 0.12	0.71
80-84	124	-2.61 ± 0.61	<0.001	0.13 ± 0.15	0.39	-3.94 ± 3.63	0.28	-13.14 ± 2.78	<0.001	0.08 ± 0.14	0.57
≥85	65	-3.81 ± 0.80	<0.001	0.51 ± 0.20	0.01	-10.13 ± 4.76	0.03	-19.88 ± 3.65	<0.001	-0.04 ± 0.18	0.81
Education
Primary education	39	Referent		Referent		Referent		Referent		Referent
Lower education	313	-0.49 ± 0.87	0.58	-0.14 ± 0.22	0.52	1.31 ± 5.18	0.80	-2.36 ± 3.97	0.55	0.11 ± 0.19	0.58
Intermediate education	154	-0.25 ± 0.91	0.79	-0.06 ± 0.23	0.80	-0.18 ± 5.41	0.97	-2.52 ± 4.15	0.54	0.07 ± 0.20	0.74
Higher education	71	0.25 ± 1.03	0.81	-0.10 ± 0.26	0.69	8.75 ± 6.15	0.16	2.22 ± 4.71	0.64	-0.08 ± 0.23	0.71
Season
Spring	142	Referent		Referent		Referent		Referent		Referent
Summer	63	1.48 ± 0.75	0.05	0.30 ± 0.19	0.11	2.89 ± 4.47	0.52	4.66 ± 3.43	0.17	-0.40 ± 0.17	0.02
Autumn	203	0.58 ± 0.54	0.28	-0.02 ± 0.13	0.85	3.17 ± 3.20	0.32	1.84 ± 2.46	0.45	-0.04 ± 0.12	0.75
Winter	169	0.38 ± 0.56	0.50	0.05 ± 0.14	0.74	3.13 ± 3.35	0.35	1.53 ± 2.57	0.55	-0.10 ± 0.13	0.44
BMI
Normal weight	164	Referent		Referent		Referent		Referent		Referent
Overweight	246	-2.06 ± 0.50	<0.001	0.45 ± 0.12	<0.001	-9.29 ± 2.97	0.002	-8.70 ± 2.28	<0.001	-0.10 ± 0.11	0.38
Obese	167	-3.87 ± 0.57	<0.001	0.90 ± 0.14	<0.001	-19.05 ± 3.36	<0.001	-16.79 ± 2.58	<0.001	-0.24 ± 0.13	0.06
Smoking
Non smoker	261	Referent		Referent		Referent		Referent		Referent
Former smoker	283	-0.35 ± 0.43	0.42	0.19 ± 0.11	0.08	-2.76 ± 2.57	0.28	-1.35 ± 1.97	0.49	-0.12 ± 0.10	0.22
Current smoker	33	-1.97 ± 0.94	0.04	0.41 ± 0.23	0.08	-9.04 ± 5.58	0.11	-8.51 ± 4.28	0.05	-0.08 ± 0.21	0.70
Alcohol consumption
Never drinks alcohol	117	Referent		Referent		Referent		Referent		Referent
Drinks 1-4 times per month	204	0.50 ± 0.58	0.39	-0.05 ± 0.14	0.71	0.15 ± 3.42	0.96	2.43 ± 2.62	0.35	0.04 ± 0.13	0.74
Drinks 2-4 times per week	256	0.78 ± 0.56	0.16	0.11 ± 0.14	0.43	3.22 ± 3.33	0.33	3.26 ± 2.55	0.20	-0.17 ± 0.13	0.17
Functional capacity
Not disabled	223	Referent		Referent		Referent		Referent		Referent
Disabled	123	0.04 ± 0.56	0.94	-0.06 ± 0.14	0.69	1.54 ± 3.36	0.65	-0.33 ± 2.57	0.90	0.00 ± 0.13	1.00
Severely disabled	231	-0.93 ± 0.50	0.06	0.06 ± 0.12	0.64	-3.43 ± 2.97	0.25	-5.42 ± 2.28	0.02	0.04 ± 0.11	0.75
Prevalent CVD, DM or cancer
Not present	308	Referent		Referent		Referent		Referent		Referent
Present	269	-1.65 ± 0.41	<0.001	0.35 ± 0.10	<0.001	-6.77 ± 2.47	0.01	-6.82 ± 1.89	<0.001	-0.13 ± 0.09	0.18
Marital status
Living alone	288	Referent		Referent		Referent		Referent		Referent
Living with partner	289	1.47 ± 0.44	<0.001	-0.18 ± 0.11	0.10	9.66 ± 2.61	<0.001	6.62 ± 2.00	<0.001	-0.10 ± 0.10	0.32
Sleep medication
Not using any medication	444	Referent		Referent		Referent		Referent		Referent
Using on 1 or more days/week	133	-0.50 ± 0.49	0.30	0.15 ± 0.12	0.21	-5.15 ± 2.90	0.08	-3.43 ± 2.23	0.12	-0.10 ± 0.11	0.37

Abbreviations: BMI, body mass index; CVD, cardiovascular disease; DM, diabetes mellitus; n, number; PA, physical activity; SE, standard error. Body mass index was calculated as weight in kilograms divided by height in meters squared. Categories were defined as normal weight: 18.5 < 25 kg/m², overweight: 25 < 30 kg/m² and obese: ≥ 30 kg/m²

The explained variance in the models, according the adjusted R-squared, was 21.0%, 11.4%, 13.2%, 22.2% and 0.8% for acceleration, sedentary behavior, light physical activity, moderate-to-vigorous physical activity and sleep, respectively.

Total N is reduced due to variation in the amount of missing data for different covariates.

The multivariate linear regression analysis was adjusted for all variables included in the table.