Table 1.

Assignment of risk factors for WMSD of the nurses.

Factor	Score
Sex	0 = M; 1 = F
Age (yr)	0 = ≤25 yrs; 1 = 26–30 yrs; 2 = 31–35 yrs; 3 = 36–40 yrs; 4 = ≥41 yrs
Working duration (yr)	0 = ≤5 yrs; 1 = 6–10 yrs; 2 = 11–15 yrs; 3 = 16–20 yrs; 4 = ≥21 yrs
BMI (kg/m2)	0 = <18.5; 1 = 18.5~23.9; 2 = 24.0~27.9; 3 = ≥28.0
Department
Department of Internal Medicine	$\begin{array}{ccccc}0& 0& 0& 0& 0\end{array}$
Department of Surgery	$\begin{array}{ccccc}0& 1& 0& 0& 0\end{array}$
Department of Emergency	$\begin{array}{ccccc}0& 0& 1& 0& 0\end{array}$
Department of Anesthesia	$\begin{array}{ccccc}0& 0& 0& 1& 0\end{array}$
Supply room	$\begin{array}{ccccc}0& 0& 0& 0& 1\end{array}$
Race	1 = Han Chinese; 2 = Minorities
Frequency of rest during working	Based on the exact working duration in the nursing care
Accumulated rest time	0 < 10 min; 1 = 10~30 min; 2 = >30 min
Shift	0 = No; 1 = Yes
Night shift	0 = None; 1 = 1–5; 2 = 6–9; 3 = ≥10
Previous history	0 = None; 1 = Yes
Working time per week	Based on the exact working time in the nursing care
Healthy conditions	0 = Satisfactory; 1 = general; 2 = poor; 3 = very poor
Feeling tired	0 = Not at all; 1 = a little; 2 = tired; 3 = very tired

The italic font served as control.