Table 1

Demographic and work characteristics of the study population (n=1700)

Sex ratio (male:female)667:1033
Age, median (IQR)28 (27–30)
Marital status, n (%)
 Single1036 (61)
 Married655 (38.5)
 Divorced9 (0.5)
Number of children, n (%)
 0343 (20.2)
 1235 (13.8)
 >186 (5.1)
Residency level (year), n (%)
 I320 (18.8)
 II410 (24.1)
 III434 (25.5)
 IV340 (20)
 V196 (11.5)
Specialty*, n (%)
 Medical854 (50.2)
 Medical and surgical221 (13)
 High-workload medical specialties299 (17.6)
 High-workload surgical specialties326 (19.2)
Working hours per week, median (IQR)60 (48–76)
Night shifts per month, median (IQR)6 (4–7)
Recovery day following night shift, n (%)98 (8)
  • *Specialties were split into four categories according to everyday difficulties: medical (eg, dermatology, pulmonology, rheumatology, neurology, psychiatry, and fundamental specialties such as histology, physiology and others), medical and surgical (eg, ophthalmology, gynaecology-obstetrics, otorhinolaryngology and others), high-workload medical specialties (eg, critical care medicine, anaesthesiology, emergency medicine, cardiology), and high-workload surgical specialties (surgery, paediatric surgery, orthopaedics, neurosurgery, urology, cardiovascular surgery and others).