Table 1

Characteristics of participants (N=1329)

FactorsNPer cent
Gender
 Male22817.2
 Female110182.8
Age (years)
 <3020915.7
 30–3960245.3
 40–4937828.4
 ≧5013910.5
Education
 High school13510.2
 College/university110583.1
 Graduate school896.7
Marital status
 Single49937.5
 Married83062.5
Profession
 Physician1017.6
 Physician assistant685.1
 Nurse57042.9
 Medical technician21616.3
 Administrative staff37428.1
Work hours (weekly)
 Normal (≦44 h)47235.5
 Overtime (>44 h)85764.5
Work shifts
 No68451.5
 Yes64548.5