Table 5. Factors associated with the appropriate VTE prophylaxis

Factor		OR	95% CI	P value
Gender	Female^*
Gender	Male	0.550	0.253 - 1.196	0.132
Age group	18 - 40^*
	41 - 60	0.129	0.050 - 0.331	< 0.001
	61 - 74	0.161	0.054 - 0.483	0.001
	≥ 75	0.204	0.054 - 0.769	0.019
Type of surgery	Non-major orthopedics^*
Type of surgery	Major orthopedics	0.865	0.345 - 2.169	0.757
Planned/unplanned surgery	Planned^*
Planned/unplanned surgery	Unplanned (urgent)	1.262	0.559 - 2.848	0.576
Surgical duration > 45 min	No^*
Surgical duration > 45 min	Yes	0.211	0.089 - 0.504	< 0.001
BMI > 25 kg/m²	No^*
BMI > 25 kg/m²	Yes	0.239	0.072 - 0.791	0.019
Confined to bed (> 72 hours)	No^*
Confined to bed (> 72 hours)	Yes	1.866	0.234 - 1.226	0.536
Plaster cast or screw splint	No^*
Plaster cast or screw splint	Yes	0.061	0.015 - 0.246	< 0.001
Length of hospital stay after surgery	≤ 4 days^*
Length of hospital stay after surgery	> 4 days	3.205	1.396 - 7.361	0.006

Reference category