Table 5.

Logistic regression analysis for amputation

Variable		Univariable			Multivariable*
		OR	95% CI of OR	P‐value	OR	95% CI of OR	P‐value
DUSS (ref: 0)	1	0·46	0·11–2·04	0·282	0·31	0·06–1·57	0·156
	2	3·93	1·15–15·85	0·036	2·77	0·56–13·69	0·212
	3–4	57·5	8·03–1222·67	<0·001	68·24	5·1–912·23	0·001
UT (ref: A)	B	4·3	0·97–30·36	0·081	4·24	0·71–25·24	0·113
	C	8·46	1·87–60·94	0·012	7·9	1·32–47·26	0·024
	D	42·17	10·53–287·7	<0·001	41·69	7·55–230·16	<0·001
UT (ref: 1)	2	6·11	1·57–40·58	0·022	3·96	0·75–20·94	0·106
	3	236·83	46·43–2066·4	<0·001	372·6	43·19–3214·77	<0·001
Wagner (ref : 0–1)	2	6·25	1·59–41·68	0·021	4·53	0·87–23·6	0·073
	3	105	19·85–933·58	<0·001	92·39	10·61–804·71	<0·001
	4	435	55·6–10420·06	<0·001	622·56	44·1–8789·65	<0·001
DEPA (ref : 3–6)	7–9	4·71	1·58–17·51	0·01	4·05	1·09–15·02	0·036
	10–12	177·37	37·57–1409·35	<0·001	160·05	22·66–1130·49	<0·001
SINBAD (ref : 0–2)	3–4	4·86	1·26–32·14	0·044	6·02	1·04–34·93	0·045
	5–6	66·5	14·81–493·95	<0·001	78·5	11·08–556·36	<0·001

CI, confidence interval; DEPA, depth of the ulcer, extent of bacterial colonisation, phase of ulcer and association aetiology; DUSS, diabetic ulcer severity score; OR, odds ratio; SINBAD, site, ischaemia, neuropathy, bacterial infection, and depth; UT, University of Texas.

^*The multivariable model was adjusted for age, gender, neuropathy, hypertension, ulcer history and log‐transformed C‐reactive protein.