Association of physical activity, sedentary behaviour, and daylight exposure with sleep in an ageing population: findings from the Whitehall accelerometer sub-study

Le Cornu, Quentin; Chen, Mathilde; van Hees, Vincent; Léger, Damien; Fayosse, Aurore; Yerramalla, Manasa S.; Sabia, Séverine

doi:10.1186/s12966-022-01391-0

International Journal of Behavioral Nutrition and Physical Activity

Table 3 Day-to-day association of daylight exposure and chronotype with sleep characteristics

From: Association of physical activity, sedentary behaviour, and daylight exposure with sleep in an ageing population: findings from the Whitehall accelerometer sub-study

	Sleep onset (min)		Sleep duration (min)		Duration of sleep window (min)		Sleep efficiency (%)
	Beta (95% CI)^a	p	Beta (95% CI)^a	p	Beta (95% CI)^a	p	Beta (95% CI)^a	p
% waking window with light exposure > 1000 lx, per 10% increase
Model 1	−3.50 (− 4.05, − 2.94)	< 0.001	1.59 (0.95, 2.22)	< 0.001	2.23 (1.55, 2.91)	< 0.001	−0.08 (− 0.15, 0.00)	0.036
Model 2	− 3.51 (− 4.06, − 2.96)	< 0.001	1.52 (0.89, 2.15)	< 0.001	2.10 (1.42, 2.78)	< 0.001	− 0.07 (− 0.14, 0.00)	0.046
Model 3	−3.50 (− 4.06, − 2.95)	< 0.001	1.49 (0.86, 2.12)	< 0.001	2.10 (1.43, 2.78)	< 0.001	−0.08 (− 0.15, − 0.01)	0.034
Model 4	− 3.64 (− 4.20, − 3.08)	< 0.001	1.49 (0.86, 2.13)	< 0.001	2.12 (1.43, 2.80)	< 0.001	− 0.08 (− 0.15, − 0.01)	0.032
Daylight chronotype^b
Model 1
Morning	0.00 (ref)		0.00 (ref)		0.00 (ref)		0.00 (ref)
Afternoon	1.88 (0.63, 3.12)	0.003	−0.11 (− 1.54, 1.32)	0.879	− 0.40 (− 1.96, 1.17)	0.619	0.02 (− 0.14, 0.18)	0.797
Evening	1.94 (0.08, 3.79)	0.041	−1.44 (−3.57, 0.69)	0.185	−2.15 (− 4.47, 0.18)	0.071	0.04 (−0.20, 0.27)	0.760
Model 2
Morning	0.00 (ref)		0.00 (ref)		0.00 (ref)		0.00 (ref)
Afternoon	1.89 (0.65, 3.14)	0.003	−0.16 (−1.59, 1.27)	0.828	−0.47 (−2.03, 1.10)	0.560	0.02 (−0.14, 0.18)	0.800
Evening	1.98 (0.12, 3.83)	0.036	−1.37 (−3.50, 0.76)	0.208	−2.00 (−4.33, 0.33)	0.092	0.03 (−0.20, 0.27)	0.787
Model 3
Morning	0.00 (ref)		0.00 (ref)		0.00 (ref)		0.00 (ref)
Afternoon	1.90 (0.66, 3.15)	0.003	−0.17 (−1.61, 1.26)	0.828	−0.48 (−2.04, 1.09)	0.551	0.02 (−0.14, 0.18)	0.816
Evening	1.99 (0.13, 3.84)	0.037	−1.39 (−3.53, 0.74)	0.208	−2.02 (−4.35, 0.31)	0.089	0.03 (−0.21, 0.27)	0.801
Model 4
Morning	0.00 (ref)		0.00 (ref)		0.00 (ref)		0.00 (ref)
Afternoon	2.76 (1.51, 4.01)	< 0.001	−0.53 (−1.97, 0.91)	0.470	−0.99 (−2.56, 0.58)	0.219	0.04 (−0.12, 0.20)	0.647
Evening	1.29 (−0.56, 3.14)	0.172	−1.10 (−3.24, 1.03)	0.312	−1.60 (− 3.93, 0.73)	0.179	0.02 (−0.22, 0.25)	0.900

^aEstimated using linear mixed-effects regressions. Model 1 adjusted for sociodemographic factors, season of wear, and day type. Model 2 additionally adjusted for behavioural factors. Model 3 additionally adjusted for body mass index, use of sleep medication, and number of chronic conditions. Model 4 corresponds to Model 3 with mutual adjustment on % waking window with light exposure > 1000 lx and light chronotype
^bDaylight chronotype corresponds to the 4-hour window with highest time > 1000 lx among the 8-12 h, 12-16 h, and 16-20 h windows. For 19 observations (0.07%) chronotype was not examined due to overlap. Among all observations (N = 26,943), 43.4% were classified as morning, 43.6% as afternoon, and 12.9% as evening light chronotype

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