Table 3

Variables affecting patients’ reported pain*

		No pain n=1188	Any pain n=1635	OR (95% CI)	P value
Site	Arms	321	459	Reference
	Thighs	674	1027	2.49 (1.21 to 5.11)	0.013
	Abdomen	177	108	1.11 (0.47 to 2.59)	0.806
	Buttocks	16	41	2.31 (0.35 to 15.17)	0.382
Age				0.94 (0.91 to 0.96)	<0.0001
Hospital stay				1 (0.97 to 1.03)	0.831
Surgical approach	Open	705	1045	Reference
	Laparoscopic	392	442	0.79 (0.38 to 1.65)	0.547
	Vulvectomy	64	147	2.32 (0.48 to 11.01)	0.289
	Radical vaginectomy	27	1	0.03 (0.01 to 0.06)	<0.0001
Pathology	Malignant	1065	1316	Reference
	Borderline	72	196	1.80 (0.56 to 5.75)	0.321
	Benign	51	123	3 (0.65 to 13.87)	0.158
Administration	Self	659	685	Reference
	Somebody else	529	950	2.81 (1.42 to 5.56)	0.003

*The outcome measure in this model was pain associated with low molecular weight heparin injection, which was represented as a binary variable (no pain 0 vs any pain 1–10). n=number of injections (2823).