Data Mining for Identifying Novel Associations and Temporal Relationships with Charcot Foot
Table 2
Novel or poorly known associations with Charcot foot based on 388 patients with Charcot foot. All disorders listed in this table temporally preceded Charcot foot in a statistically significant () number of patients.
Disease category
ICD-9 code
ICD-9 description
Number (%) with both disorders
Association odds ratio
Association value
Temporal value
Endocrine, nutritional and metabolic diseases, and immunity disorders
244.9
Hypothyroidism
42 (10.8)
6.1
272.0
Hypercholesterolemia
82 (21.1)
17.9
272.4
Hyperlipidemia
173 (44.6)
17.4
276.3
Alkalosis
13 (3.4)
14.0
276.5
Volume depletion disorder
84 (21.6)
8.1
Sense organs
366.16
Senile nuclear cataract
110 (28.4)
13.3
Circulatory system
401.1
Benign essential hypertension
113 (29.1)
13.3
402.10
Benign hypertensive disease without heart failure
15 (3.9)
6.6
411.1
Intermediate coronary syndrome
38 (9.8)
13.9
413.9
Angina pectoris
41 (10.6)
13.1
414.0
Coronary atherosclerosis
18 (4.6)
7.2
414.00
Coronary atherosclerosis, vessel type
155 (39.9)
18.6
<5 ×  
414.01
Coronary atherosclerosis, native artery
97 (25.0)
16.3
414.02
Coronary atherosclerosis, autologous graft
11 (2.8)
15.7
414.9
Chronic ischemic heart disease
49 (12.6)
14.7
424.0
Mitral valve disorder
32 (8.2)
7.4
425.4
Cardiomyopathy, primary
44 (11.3)
11.6
427.9
Cardiac dysrhythmia
168 (43.3)
7.6
428.0
Congestive heart failure
84 (21.6)
11.0
428.9
Heart failure, not otherwise specified
38 (9.8)
10.1
429.9
Heart disease, not otherwise specified
39 (10.1)
10.5
440.21
Atherosclerosis of native arteries of the extremities with intermittent claudication