Work-related musculoskeletal symptoms among Iranian nurses and their relationship with fatigue: a cross-sectional study

Table 3 Modeling on the association between potential risk factors and WMSs in different body regions of participants in the last 12 months using multiple logistic regression (N = 500)

Body region	Association between potential risk factors and WMSs
Body region	Potential risk factor	OR	95% CI	p^*
Neck	Type of employment
	Contract employees: Reference	1.635	1.138–2.349	0.008
	Formal employees
Shoulders	Smoking
	No: Reference	2.835	1.389–5.787	0.004
	Yes
	Shift work
	No: Reference	2.388	1.120–5.089	0.024
	Yes
Elbows	Age (years)
	≤ 35: Reference	1.777	1.006–3.167	0.047
	> 35
Wrists/Hands	-	-	-	-
Upper back	Age (years)
	≤ 35: Reference	2.119	1.35–3.324	0.001
	> 35
Lower back	Job tenure (years)
	≤ 10: Reference	1.782	1.054–3.013	0.031
	> 10
Thighs	-	-	-	-
Knees	Gender
	Male: Reference	1.772	1.152–2.727	0.009
	Female
	Shift work
	No: Reference	2.649	1.200–5.850	0.016
	Yes
Ankles/Feet	Gender
	Male: Reference	2.266	1.380–3.718	0.001
	Female
WMSs at least in one body region	Age (years)
	≤ 35: Reference	1.134	1.024–2.843	0.003
	> 35
	Job tenure (years)
	≤ 10 years: Reference	1.604	1.078–2.98	0.034
	> 10 years

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