Table 3 Open in new tab Logistic...

Chronic insomnia symptoms

Crude OR

P value

Adjusted OR (95% CI)

Age

0.96

.070

0.95 (0.89–1.01)

Length of service

1.00

.974

Drinking habits

.036

Nondrinker

ref

Normal (ethanol consumption ≤483 g/wk)

2.52

4.85 (0.99–23.7)

Heavy (ethanol consumption >483 g/wk)

5.05

6.21 (1.07–35.8)

Smoking habits

.317

Never

ref

Past

2.42

1.46 (0.27–7.74)

Current

1.55

0.51 (0.09–2.68)

Caffeine intake

.956

Normal (≤400 mg/d)

ref

Heavy (>400 mg/d)

0.98

Caffeine intake before sleep

.043

(−)

ref

(+)

2.10

2.65 (1.09–6.45)

Body mass index

.994

<25 kg/m ²

ref

≥25 kg/m ²

1.00

Sleep duration on workdays

0.81

.185

0.84 (0.57–1.25)

Sleep duration on days off

1.19

.227

1.44 (1.01–2.05)

Daily driving hours

.257

<8 h

ref

≥8 h

1.49

1.40 (0.53–3.64)

Driving distance

.042

Short-haul

ref

Middle-haul

2.65

1.67 (0.61–4.58)

Long-haul

1.27

0.78 (0.23–2.60)

Consecutive days away from home

.639

Not applicable

ref

1 day

1.19

2 days or longer

1.46

State-Trait Anxiety Inventory (STAI)

<.001

≤39

ref

40 to ≤44

2.07

1.70 (0.29–9.93)

45 to ≤50

3.87

3.84 (0.77–18.9)

≥51

12.92

12.8 (2.53–64.2)

Lifestyle-related diseases

Hypertension ^a

0.77

.506

Dyslipidemia ^b

0.73

.360

Diabetes ^c

0.83

.806

Table 3

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Logistic regression analyses of chronic insomnia symptoms.

		Chronic insomnia symptoms
		Crude OR	P value	Adjusted OR (95% CI)
Age		0.96	.070	0.95 (0.89–1.01)
Length of service		1.00	.974
Drinking habits			.036
	Nondrinker	ref		ref
	Normal (ethanol consumption ≤483 g/wk)	2.52		4.85 (0.99–23.7)
	Heavy (ethanol consumption >483 g/wk)	5.05		6.21 (1.07–35.8)
Smoking habits			.317
	Never	ref		ref
	Past	2.42		1.46 (0.27–7.74)
	Current	1.55		0.51 (0.09–2.68)
Caffeine intake			.956
	Normal (≤400 mg/d)	ref
	Heavy (>400 mg/d)	0.98
Caffeine intake before sleep			.043
	(−)	ref		ref
	(+)	2.10		2.65 (1.09–6.45)
Body mass index			.994
	<25 kg/m ²	ref
	≥25 kg/m ²	1.00
Sleep duration on workdays		0.81	.185	0.84 (0.57–1.25)
Sleep duration on days off		1.19	.227	1.44 (1.01–2.05)
Daily driving hours			.257
	<8 h	ref		ref
	≥8 h	1.49		1.40 (0.53–3.64)
Driving distance			.042
	Short-haul	ref		ref
	Middle-haul	2.65		1.67 (0.61–4.58)
	Long-haul	1.27		0.78 (0.23–2.60)
Consecutive days away from home			.639
	Not applicable	ref
	1 day	1.19
	2 days or longer	1.46
State-Trait Anxiety Inventory (STAI)			<.001
	≤39	ref		ref
	40 to ≤44	2.07		1.70 (0.29–9.93)
	45 to ≤50	3.87		3.84 (0.77–18.9)
	≥51	12.92		12.8 (2.53–64.2)
Lifestyle-related diseases
	Hypertension ^a	0.77	.506
	Dyslipidemia ^b	0.73	.360
	Diabetes ^c	0.83	.806

		Chronic insomnia symptoms
		Crude OR	P value	Adjusted OR (95% CI)
Age		0.96	.070	0.95 (0.89–1.01)
Length of service		1.00	.974
Drinking habits			.036
	Nondrinker	ref		ref
	Normal (ethanol consumption ≤483 g/wk)	2.52		4.85 (0.99–23.7)
	Heavy (ethanol consumption >483 g/wk)	5.05		6.21 (1.07–35.8)
Smoking habits			.317
	Never	ref		ref
	Past	2.42		1.46 (0.27–7.74)
	Current	1.55		0.51 (0.09–2.68)
Caffeine intake			.956
	Normal (≤400 mg/d)	ref
	Heavy (>400 mg/d)	0.98
Caffeine intake before sleep			.043
	(−)	ref		ref
	(+)	2.10		2.65 (1.09–6.45)
Body mass index			.994
	<25 kg/m ²	ref
	≥25 kg/m ²	1.00
Sleep duration on workdays		0.81	.185	0.84 (0.57–1.25)
Sleep duration on days off		1.19	.227	1.44 (1.01–2.05)
Daily driving hours			.257
	<8 h	ref		ref
	≥8 h	1.49		1.40 (0.53–3.64)
Driving distance			.042
	Short-haul	ref		ref
	Middle-haul	2.65		1.67 (0.61–4.58)
	Long-haul	1.27		0.78 (0.23–2.60)
Consecutive days away from home			.639
	Not applicable	ref
	1 day	1.19
	2 days or longer	1.46
State-Trait Anxiety Inventory (STAI)			<.001
	≤39	ref		ref
	40 to ≤44	2.07		1.70 (0.29–9.93)
	45 to ≤50	3.87		3.84 (0.77–18.9)
	≥51	12.92		12.8 (2.53–64.2)
Lifestyle-related diseases
	Hypertension ^a	0.77	.506
	Dyslipidemia ^b	0.73	.360
	Diabetes ^c	0.83	.806

Abbreviations: OR, odds ratio; ref, reference.

Systolic blood pressure ≥140 mmHg, diastolic blood pressure ≥90 mmHg, and/or antihypertensive drug use.

Triglyceride level ≥150 mg/dL, high-density lipoprotein cholesterol (HDL-C) <40 mg/dL, low-density lipoprotein cholesterol (LDL-C) level ≥140 mg/dL, and/or hypolipidemic agents use.

Fasting blood glucose ≥126 mg/dL, and/or antidiabetic drug use.

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