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

Table 3 Main effects on needle stick and sharps injuries in various models for resident doctors and junior nurses

Main effect		N	ORs for NSIs
			n	M0	M1	M2
Body weight level	HBW	95	3	0.1b	0.1b	0.1b
	UHBW	52	12	1.0	1.0	1.0
OT work	Heavy	13	4	4.5a	4.5a	1.9
	Moderate	46	5	1.6	1.6	1.7
	Mild	88	6	1.0	1.0	1.0
Professional subfield	RD	26	7	4.1a	12.7b	19.5a
	JN	121	8	1.0	1.0	1.0

^aP < 0.05.

^bP < 0.001.

Odds ratio = 1.0 indicates the reference. ORs: Odds ratios; N: Participants; n: Participants for needle stick and sharps injuries; M₀: Model only including the main effect; M₁: Model adjusted for sex and age; M₂: Model adjusted for sex, age, and main effects; RD: Resident doctor; JN: Junior nurse; HBW: Healthy body weight; UHBW: Unhealthy body weight; OT: Overtime; NSIs: Needle stick and sharps injuries.