Association of overtime work and obesity with needle stick and sharp injuries in medical practice

Table 4 Main effects on needle stick and sharps injuries for experienced nurses

Main effect		Participants		ORs for NSIs
			n	M0	M1
Body weight level	HBW	276	5	1.3	1.2
	UHBW	208	3	1.0	1.0
OT work	Heavy	22	2	7.0a	6.6a
	Moderate	105	1	0.7	0.7
	Mild	357	5	1.0	1.0

^aP <0.05.

Odds ratio = 1.0 indicates the reference. ORs: Odds ratios; HBW: Healthy body weight; OT: Overtime; NSIs: Needle stick and sharps injuries; n: Participants for needle stick and sharps injuries; M₀: Model only including the main effect; M₁: Model adjusted for age, sex, body weight, and overtime work.