Table 4.

Multivariable Logistic Regression Analysis of Factors Associated with Sleep Problems.

Variables	OR (95% CI)	p-Value
Poor appetite	1.16 (0.97-1.39)	0.096
Constipation or diarrhea	1.36 (1.18-1.56)	<0.001
Interpersonal stress at work	1.21 (1.05-1.39)	0.007
Fatigue	1.50 (1.27-1.77)	<0.001
Depressive mood	1.60 (1.38-1.85)	<0.001
Job and life satisfaction	0.74 (0.63-0.88)	<0.001
Job category
Administrative staff	1.00 (ref)
Nurse	1.09 (0.80-1.49)	0.580
Research staff	1.09 (0.76-1.54)	0.645
Co-medical staff	0.74 (0.50-1.09)	0.124
Physician	0.60 (0.34-1.04)	0.069
Dentist	0.45 (0.22-0.92)	0.028
Constant term	0.005 (0.002-0.013)	<0.001

Notes: The model included low back pain, poor gastrointestinal condition, poor appetite, constipation or diarrhea, interpersonal stress at work, fatigue, depressive mood, job and life satisfaction, and job category. Job category was treated as a categorical variable, with administrative staff as the reference group. Differences were considered statistically significant at p < 0.05.

CI: confidence interval; OR: odds ratio; ref: reference.