Table 5.

Results of linear mixed-effects models predicting total WEMWBS and global PSQI using an indicative subset of PROMs and actigraphy measures.

Y	Variables	Model coef.	95% CI	t-statistic	p-value
Total WEMWBS = f(PROMs + actigraphy)	(Intercept)	47.498	[23.614, 71.381]	3.911	< 0.001
	Gender_1	− 0.798	[− 2.591, 0.994]	− 0.876	0.382
	Age	0.059	[− 0.360, 0.478]	0.279	0.781
	Day into study	− 0.001	[− 0.006, 0.003]	− 0.626	0.532
	Work sector: manufacturing	1.567	[− 2.486, 5.619]	0.760	0.448
	Work sector: social care	− 0.781	[− 4.622, 3.061]	− 0.400	0.690
	Work sector: finance	− 1.596	[− 4.193, 1.001]	− 1.209	0.227
	BJSQ 23: irritable	− 0.946	[− 1.496, − 0.395]	− 3.376	< 0.001
	BJSQ 27: tense	− 0.813	[− 1.437, − 0.189]	− 2.561	0.011
	BJSQ 46: can’t sleep	− 0.310	[− 0.861, 0.241]	− 1.105	0.270
	WWQBI 1: stressed	− 0.230	[− 0.705, 0.246]	− 0.95	0.343
	WWQBI 10: work-life balance	2.232	[1.559, 2.904]	6.526	< 0.001
	Sedentary minutes_m3	− 0.871	[− 1.399, − 0.344]	− 3.251	0.001
	RA_m7	13.876	[4.831, 22.920]	3.017	0.003
	IV1_m7	8.487	[2.622, 14.351]	2.846	0.005
	Sleep duration_m7	− 24.698	[− 37.67, − 11.725]	− 3.744	< 0.001
	Sleep efficiency_m7	− 1.176	[− 2.387, 0.035]	− 1.91	0.057
	Sleep onset phase_v7	− 0.035	[− 0.564, 0.493]	− 0.131	0.896
	Awakenings total minutes_v7	1.052	[− 0.035, 2.139]	1.904	0.058
	Sleep efficiency_v7	− 4.357	[− 6.733, − 1.980]	− 3.605	< 0.001
Global PSQI = f(PROMs + actigraphy)	(Intercept)	7.057	[− 5.204, 19.318]	1.132	0.258
	Gender_1	0.092	[− 0.852, 1.036]	0.192	0.848
	Age	0.002	[− 0.213, 0.216]	0.0150	0.988
	Day into study	− 0.001	[− 0.003, 0.002]	− 0.580	0.563
	Work sector: manufacturing	2.629	[0.564, 4.695]	2.504	0.013
	Work sector: social care	− 1.177	[− 3.197, 0.843]	− 1.147	0.252
	Work sector: finance	− 1.337	[− 2.691, 0.017]	− 1.942	0.053
	BJSQ 1: much work	0.354	[0.022, 0.686]	2.097	0.037
	BJSQ 24: tired	− 0.164	[− 0.448, 0.119]	− 1.14	0.255
	BJSQ 27: tense	− 0.155	[− 0.464, 0.154]	− 0.986	0.325
	BJSQ 46: can’t sleep	0.407	[0.127, 0.686]	2.865	0.004
	WWQBI 1: stressed	− 0.277	[− 0.508, − 0.045]	− 2.351	0.019
	WWQBI 10: work-life balance	− 0.713	[− 1.082, − 0.343]	− 3.796	< 0.001
	Awakenings total minutes_m3	0.111	[− 0.077, 0.299]	1.163	0.246
	Sleep duration_m3	− 0.0330	[− 0.437, 0.371]	− 0.162	0.872
	Sleep efficiency_m3	− 0.368	[− 0.605, − 0.131]	− 3.059	0.002
	Sleep onset_phase_v3	0.290	[0.098, 0.481]	2.979	0.003
	Sleep efficiency_v3	− 0.0560	[− 0.394, 0.281]	− 0.328	0.743

CI stands for Confidence Interval. See the subsection ‘Linear mixed-effects models’ in the “Methods” section for the generic mixed-effects model formula and further details. The actual variables used in the models are presented in the second column of the Table. Bold entries indicate statistical significance at the p = 0.05 level; for convenience we followed the convention that low computed p-values were marked as < .001. See the “Questionnaires_in_SHAW.xlsx” supplementary file for details of each item. The total WEMWBS lies in the range 14–70, higher being better; the global PSQI lies in the range 0–21, lower being better.