Table 2.

Work, health and sleep factors associated with poor sleep quality, 2018.

VARIABLE	CATEGORY	Bivariate	Multiple*#
		PR (95% CI)	PR (95% CI)
Work-related aspects
Frequency of operational flight	Never, rarely, or sometimes	1	1
Delays	Frequently or always	1.40 (1.25-1.57)	1.14 (1.01-1.28)
Difficulty commuting between	Never or almost never	1	1
residence and airport	Sometimes	1.26 (1.11-1.43)	ns
	Frequently or always	1.49 (1.28-1.73)	1.19 (1.04-1.38)
Start time of day shift	7:00-11:00h	1
	24:00-4:59h	1.36 (1.08-1.69)
	5:00-5:59h	1.16 (0.93-1.42)
	6:00-6:59h	0.88 (0.68-1.13)
End time of afternoon shift	16:00-21:59h	1
	22:00-23:59h	1.14 (0.98-1.30)
	24:00-6:00h	1.31 (1.09-1.56)
Maximum number of consecutive	≤6 days	1
days worked	≥ 7 days	1.25 (1.09-1.42)
Maximum number of consecutive	1-2 nights	1	1
nights worked	3-4 nights	1.31 (1.07-1.59)	ns
	≥ 5 nights	1.55 (1.26-1.91)	1.33 (1.09-1.62)
Flight hours per month	≤ 65 hours	1
	≥ 66 hours	1.14 (1.01-1.28)
Health and sleep aspects
Need for recovery after work	Less need	1	1
	Moderate need	2.06 (1.69-2.50)	1.96 (1.60-2.41)
	Greater need	2.73 (2.26-3.27)	2.38 (1.94-2.91)
Weekly physical activity time	≥150 minutes	1	1
	< 150 minutes	1.26 (1.11-1.41)	1.17 (1.05-1.32)
Self-perceived diurnal	Indifferent	1
Preference	Morning	1.29 (1.01-1.64)
	Evening	1.49 (1.18-1.89)
Sleep duration after day shift	> 8 hours	1
	6-8 hours	1.35 (1.02-1.77)
	< 6 hours	2.17 (1.63-2.87)
Sleep duration after night shift	> 8 hours	1
	6-8 hours	1.05 (0.87-1.27)
	< 6 hours	1.41 (1.17-1.71)
Sleep duration during days off	> 8 hours	1	1
	6-8 hours	1.22 (1.07-1.37)	1.16 (1.03-1.31)
	< 6 hours	1.93 (1.59-2.33)	1.59 (1.31-1.93)

^*Adjusted for gender, age, having children < 12 years of age, education, BMI and marital status

^#Area ROC = 0.73

^nsnot significant