Table 6

Physical symptoms, psychological health perception, substance use and quality and pattern of sleep stratified by specialty

	Night shift workers				Day shift workers
	Physicians	Nurses	Applied healthcare	P value	Physicians	Nurses	Applied healthcare	P value
Questionnaire items (%)
Headache	46.0%	62.3%	39.2%	0.009**	38.9%	74.1%	57.1%	0.061
Fatigue	62.8%	70.8%	70.6%	0.396	50.0%	74.1%	74.3%	0.150
Depression	38.1%	32.1%	39.2%	0.564	33.3%	25.9%	42.9%	0.377
Mood irritability	55.8%	62.3%	60.8%	0.600	44.4%	51.9%	57.1%	0.679
Quality or quantity of sleep	67.3%	71.7%	72.5%	0.702	55.6%	40.7%	54.3%	0.495
Psychological health	31.9%	33.0%	27.5%	0.776	11.1%	18.5%	25.7%	0.440
Cardiovascular health	8.8%	17.9%	19.6%	0.082	0.0%	7.4%	14.3%	0.209
Gastrointestinal health	19.5%	25.5%	21.6%	0.561	5.6%	25.9%	20.0%	0.223
Questionnaire items, mean±SD
Level of job satisfaction	3.64 (SD=1.07)	3.29 (SD=1.04)	3.57 (SD=0.95)	0.039*	4.00 (SD=0.84)	3.59 (SD=0.89)	3.91 (SD=1.01)	0.276
Level of safety performance	3.59 (SD=1.24)	3.70 (SD=1.19)	3.37 (SD=1.16)	0.271	3.17 (SD=1.42)	3.81 (SD=1.04)	3.74 (SD=0.82)	0.101
Adverse effect of working hours on social life	3.96 (SD=1.05)	3.88 (SD=1.21)	4.06 (SD=1.15)	0.635	2.94 (SD=1.39)	3.59 (SD=1.22)	3.97 (SD=1.10)	0.017*
Adverse effect of working hours on family lives	3.89 (SD=1.04)	3.84 (SD=1.24)	4.11 (SD=0.99)	0.327	3.06 (SD=1.21)	3.63 (SD=1.24)	3.63 (SD=1.17)	0.211
Stimulant substance use (%)
Caffeine	83.2%	71.7%	80.4%	0.110	72.2%	74.1%	77.1%	0.918
Smoking	28.3%	19.8%	29.4%	0.260	11.1%	11.1%	20.0%	0.543
Stimulants pills	8.0%	1.9%	2.0%	0.059	5.6%	0.0%	0.0%	0.175
Quality and pattern of sleep (%)
Not falling asleep	37.5%	65.1%	56.9%	0.000***	33.3%	48.1%	31.4%	0.370
Not staying asleep	46.4%	63.2%	45.1%	0.022*	22.2%	37.0%	37.1%	0.501