Table 2: Characteristics of patients with diabetic foot ulcers (categorical values).

Risk factors	Total n (%)	Amputation n (%)	Non-amputation n (%)	p-value
Gangrenous Wagner*	184/462 (39.8)	161/274 (58.8)	23/188 (12.2)	<0.001
Infection†	393/456 (86.2)	256/272 (94.1)	137/184 (74.5)	<0.001
Severe bacterial infection‡	113/455 (24.8)	93/271 (34.3)	20/184 (10.9)	<0.001
Pathogenesis of ulcer	363	244	119	<0.001
Neuropathic	164 (45.2)	76 (31.1)	88 (73.9)
Neuroischaemic	132 (36.4)	115 (47.1)	17 (14.4)
I schaemic	67 (18.5)	53 (21.7)	14 (11.8)
Neuropathy	373/460 (81.1)	220/284 (77.5)	153/176 (86.9)	0.012
Retinopathy	229/300 (76.3)	155/196 (79.1)	74/104 (71.2)	0.124
Nephropathy	283/371 (76.3)	178/224 (79.5)	105/147 (71.4)	0.075
Glomerular filtration rate <60 mL/min/1.73 m2	157/483 (32.5)	102/282 (36.2)	55/201 (35.0)	0.042
Coronary vascular disease	224/333 (67.3)	164/235 (69.8)	60/98 (61.2)	0.129
Atherosclerotic peripheral arteries	292/373 (78.3)	235/256 (91.8)	57/117 (48.7)	<0.001
Cerebral arterial disease	81/226 (35.8)	63/152 (41.4)	18/74 (24.3)	0.012
Hypertension	403/480 (84.0)	255/289 (88.2)	148/191 (77.5)	0.002
Chronic respiratory disease	35/489 (7.2)	23/295 (7.8)	12/194 (6.2)	0.499
Congestive heart failure	67/488 (13.7)	49/295 (16.6)	18/193 (9.3)	0.022
Hepatosteatosis	111/217 (51.2)	82/160 (51.3)	29/57 (50.9)	0.961
Being on dialysis with end-stage renal disease	45/494 (9.1)	38/298 (12.8)	7/196 (3.6)	0.001
Hypercholesterolaemia	349/453 (77.0)	241/274 (88.0)	108/179 (60.3)	<0.001
Hypertriglyceridaemia	170/453 (37.5)	119/273 (43.6)	51/180 (28.3)	0.001
Hyperlipidaemia	361/453 (79.7)	243/274 (88.7)	118/179 (65.9)	<0.001

*Gangrenous Wagner defined as Wagner scores 4 and 5.

^†Defined as C-reactive protein >0.5 mg/dL.

^‡Defined as C-reactive protein >10 mg/dL.