Table 4.

Multiple regression analysis on variables related to anxiety, depression, sleepiness and exhaustion for police employees and retail workers engaged in evening shifts or rotating shifts.

		Retail workers (n = 176)					Police employees (n = 173)
Shift work intolerance symptoms	Predictor variables	Beta	SE	96% CI B	P	R 2	Beta	SE	96% CI B	P	R 2
Anxiety						0.52*					0.07
	Sex	0.01	0.72	[−1.238, 1.603]	0.800		0.11	0.44	[−0.219, 1.535]	0.141
	Age	−0.06	0.02	[−0.068,0.020]	0.278		0.02	0.02	[−0.038,0.046]	0.844
	Evening versus rotating	−0.08	0.87	[−2.992,0.437]	0.143		−0.01	0.73	[−1.562, 1.324]	0.871
	Neuroticism	0.65**	0.42	[2.783, 4.423]	<0.001		0.23*	0.43	[0.217, 1.909]	0.014
	Extroversion	0.10	0.47	[−0.204, 1.643]	0.126		0.18	0.54	[−0.029, 2.106]	0.057
	Autonomy	−0.21*	0.29	[−1.352, −0.204]	0.008		−0.07	0.31	[−0.853,0.358]	0.421
	Competence	0.10	0.34	[−0.290, 1.040]	0.267		0.03	0.32	[−0.526,0.753]	0.726
	Relatedness	−0.07	0.28	[−0.845,0.277]	0.319		−0.00	0.33	[−0.665,0.647]	0.979
Depression						0.43**					0.03
	Sex	−0.10	0.67	[−2.444,0.219]	0.101		−0.10	0.45	[−1.463,0.314]	0.204
	Age	−0.07	0.02	[−0.065,0.018]	0.262		0.09	0.02	[−0.020,0.066]	0.294
	Evening versu rotating	−0.08	0.81	[−2.761,0.453]	0.158		−0.04	0.74	[−1.826, 1.099]	0.624
	Neuroticism	0.28**	0.39	[0.563, 2.100]	<0.001		0.10	0.43	[−0.380, 1.334]	0.273
	Extroversion	−0.16*	0.44	[−1.858, −0.127]	0.025		0.07	0.55	[−0.658, 1.505]	0.441
	Autonomy	−0.20*	0.27	[−1.164, −0.088]	0.023		0.01	0.31	[−0.578,0.649]	0.908
	Competence	−0.01	0.32	[−0.657,0.589]	0.914		0.00	0.33	[−0.639,0.658]	0.977
	Relatedness	−0.15*	0.27	[−1.054, −0.002]	0.049		−0.05	0.34	[−0.846,0.484]	0.591
Sleepiness						0.35*					0.03
	Sex	0.15*	0.18	[0.052,0.778]	0.025		.01	.08	[−0.139,0.167]	0.856
	Age	−0.12	.01	[−0.022,0.001]	0.064		−0.06	.00	[−0.011,0.004]	0.418
	Evening versu rotating	0.05	0.22	[−0.252,0.623]	0.404		−0.02	.13	[−0.288,0.214]	0.772
	Neuroticism	0.41**	0.11	[0.286,0.705]	<0.001		0.09	0.08	[−0.074,0.221]	0.328
	Extroversion	0.01	0.12	[−0.209,0.263]	.823		−0.01	0.09	[−0.198,0.172]	0.891
	Autonomy	−0.31**	0.07	[−0.394, −0.100]	0.001		0.09	0.05	[−0.050,0.164]	.297
	Competence	0.10	0.09	[−0.081,0.259]	0.302		−0.13	0.06	[−0.195,0.035]	.173
	Relatedness	−0.00	0.07	[−0.146,0.141]	0.976		−0.00	0.06	[−0.122,0.113]	0.942
Insomnia						0.32*					0.06
	Sex	0.10	0.07	[−1.161, 7.153]	0.157		0.14	1.24	[−0.034, 4.887]	0.053
	Age	−0.03	2.54	[−0.165,0.092]	0.573		0.03	.06	[−0.098,0.145]	0.703
	Evening v rotating	−0.05	1.22	[−6.790, 3.244]	0.486		−0.09	2.05	[−6.541, 1.534]	0.223
	Neuroticism	0.39**	1.37	[2.856, 7.654]	<0.001		0.17	1.20	[−0.046, 4.696]	0.055
	Extroversion	0.04	0.85	[−1.989, 3.417]	0.603		0.12	1.51	[−0.843, 5.107]	0.159
	Autonomy	−0.36**	0.99	[−4.897, −1.537]	<0.001		0.07	0.87	[−0.996, 2.441]	0.408
	Competence	0.15	0.83	[−0.509, 3.383]	0.147		0.02	0.94	[−1.641, 2.055]	0.825
	Relatedness	−0.03	2.36	[−1.950, 1.334]	0.712		−0.04	0.96	[−2.312, 1.473]	0.663
Exhaustion						0.53					0.41**
	Sex	0.14*	0.14	[0.056,0.624]	0.019		0.09	0.07	[−0.028,0.248]	0.118
	Age	−0.07	0.00	[−0.014,0.004]	0.258		0.00	0.00	[−0.007.007]	0.980
	Evening versu rotating	0.01	0.17	[−0.292,0.374]	0.807		0.06	0.12	[−0.118,0.336]	0.343
	Neuroticism	0.33**	0.08	[0.198,0.527]	<0.001		0.42**	0.07	[0.284,0.550]	<0.001
	Extroversion	−0.13	0.09	[−0.353,0.013]	0.069		−0.13	0.09	[−0.330,0.005]	0.057
	Autonomy	−0.48**	0.06	[−0.443, −0.217]	<0.001		−0.23**	0.05	[−0.260, −0.067]	0.001
	Competence	0.03	0.07	[−0.105,0.157]	0.696		−0.07	0.05	[−0.154,0.054]	0.345
	Relatedness	0.05	0.06	[−0.076,0.148]	0.523		0.04	0.05	[−0.077,0.136]	0.589

*P < 0.05; **P < 0.001.