Table 1.
Sociodemographics, Sleep Characteristics, and WMSDs Among Nurses (N = 397)
| Variables | M ± SD or percentage |
|---|---|
| Age | 43.2 ± 12.0 |
| ≤40 years | 42.0% |
| >40–60 years | 48.4% |
| >60 years | 9.6% |
| Gender | |
| Female | 95.2% |
| Male | 4.8% |
| Race | |
| White | 91.9% |
| Black | 3.1% |
| Others | 5.0% |
| BMI | 26.8 ± 6.0 |
| Normal | 44.4% |
| Overweight | 31.9% |
| Obese | 23.7% |
| Regular exercise | 43.1% |
| Shift work | |
| 8-hour day | 35.9% |
| 8-hour evening | 13.7% |
| 8-hour night | 6.9% |
| 12-hour day | 20.1% |
| 12-hour eveninga | 3.6% |
| 12-hour night | 19.8% |
| Chronotype | |
| Morning type | 49.5% |
| Evening type | 29.1% |
| Intermediate type | 21.4% |
| Sleep duration ≤ 6 hours/day | 49.2% |
| Sleep onset latency ≥ 30 minutes | 44.5% |
| Sleep episodes ≥ 2/day | 18.7% |
| Sleep-promoting substance (yes) | 30.4% |
| Sleep disturbances (moderate/severe) | 11.4% |
| WMSDs (yes) | 47.4% |
Note. WMSD = work-related musculoskeletal disorder; BMI = body mass index.
a
12-hour evening shift includes work schedules of 9:00 a.m. to 9:00 p.m., 11:00 a.m. to 11:00 p.m., and 12:00 p.m. to 12:00 a.m.