Table 1.

Hazard ratios of all-cause mortality for Models 1 to 3, alongside percentage and number of deaths, according to percentile groups for day light and night light

		Light exposure percentile	% (N)	HR [95%CI]	P-value
Model 1	Night	0 to 50% (ref.)	4.09 (1,812)	–	–
N = 88,600		50 to 70%	3.88 (688)	1.02 [0.93 to 1.11]	0.69
		70 to 90%	4.44 (787)	1.17 [1.08 to 1.28]*	0.00022
		90 to 100%	5.01 (444)	1.34 [1.20 to 1.49]*	<0.0001
	Day	0 to 50% (ref.)	4.35 (1,925)	–	–
		50 to 70%	4.10 (726)	0.84 [0.77 to 0.92]*	0.00018
		70 to 90%	3.96 (701)	0.74 [0.67 to 0.82]*	<0.0001
		90 to 100%	4.28 (379)	0.66 [0.58 to 0.75]*	<0.0001
Model 2	Night	0 to 50% (ref.)	4.06 (1769)	–	–
N = 87,052		50 to 70%	3.87 (674)	1.02 [0.93 to 1.11]	0.74
		70 to 90%	4.44 (773)	1.18 [1.09 to 1.29]*	0.00012
		90 to 100%	4.94 (430)	1.31 [1.18 to 1.46]*	<0.0001
	Day	0 to 50% (ref.)	4.31 (1,878)	–	–
		50 to 70%	4.10 (713)	0.86 [0.79 to 0.94]*	0.0011
		70 to 90%	3.94 (686)	0.76 [0.69 to 0.84]*	<0.0001
		90 to 100%	4.24 (369)	0.68 [0.60 to 0.78]*	<0.0001
Model 3	Night	0 to 50% (ref.)	4.06 (1,737)	–	–
N = 85,562		50 to 70%	3.88 (664)	1.01 [0.92 to 1.10]	0.85
		70 to 90%	4.46 (763)	1.15 [1.06 to 1.25]*	0.0015
		90 to 100%	4.94 (423)	1.21 [1.08 to 1.35]*	0.00064
	Day	0 to 50% (ref.)	4.31 (1,844)	–	–
		50 to 70%	4.10 (702)	0.90 [0.83 to 0.99]*	0.031
		70 to 90%	3.95 (676)	0.84 [0.76 to 0.93]*	0.00075
		90 to 100%	4.27 (365)	0.83 [0.72 to 0.94]*	0.0042

Hazard ratios represent risks of all-cause mortality across light exposure percentile groups, compared to a reference light exposure group, for day and night light. Model 1 was adjusted for age, sex, ethnicity, and photoperiod; Model 2 was additionally adjusted for employment status, education, income, and deprivation; Model 3 was further adjusted for physical activity, smoking status, alcohol consumption, urbanicity, and social activity.

^*P < 0.05.