Table 1.
Characteristics of Patients and Control Subjects in Relation to Risk of Jones Fracture.
| No. of Patients (N=50) | No. of Controls (N=200) | Odds Ratio (95% Confidence Interval) | |
|---|---|---|---|
| Gender | |||
| Male | 15 (30%) | 60 (30%) | |
| Female | 35 (70%) | 140 (70%) | |
| Age (in years) | |||
| ≤20 | 3 (6%) | 12 (6%) | |
| 21–30 | 6 (12%) | 23 (11.5%) | |
| 31–40 | 3 (6%) | 13 (6.5%) | |
| 41–50 | 11 (22%) | 43 (21.5%) | |
| 51–60 | 13 (26%) | 52 (26%) | |
| 61–70 | 9 (18%) | 37 (18.5%) | |
| >70 | 5 (10%) | 20 (10%) | |
| Body mass index (in kg/m2)* | |||
| ≤25 | 17 (34%) | 74 (37%) | 1.0 (referent) |
| 25 to 30 | 14 (28%) | 72 (36%) | 0.86 (0.35–2.0) |
| >30 | 19 (38%) | 54 (27%) | 1.2 (0.50–3.0) |
| Current smoker | |||
| Yes | 1 (2%) | 10 (5%) | 0.49 (0.05–4.2) |
| No | 49 (98%) | 190 (95%) | 1.0 (referent) |
| Metatarsus adductus angle* (in degrees) | |||
| ≤15 | 17 (34%) | 102 (51%) | 1.0 (referent) |
| >15 to 19 | 13 (26%) | 59 (30%) | 1.5 (0.67–3.5) |
| >19 | 20 (40%) | 38 (19%) | 4.6 (1.88–11.4)† |
| Intermetatarsal angle 4th/5th* (in degrees) | |||
| >10 | 7 (14%) | 37 (19%) | 1.0 (referent) |
| ≥7 to 10 | 16 (32%) | 95 (47%) | 1.3 (0.44–3.7) |
| <7 | 27 (54%) | 68 (34%) | 4.5 (1.45–13.9)¥ |
| Calcaneal inclination angle* (in degrees) | |||
| <18 | 16 (32%) | 63 (32%) | 1.0 (referent) |
| ≥18 to 22 | 11 (22%) | 56 (28%) | 0.73 (0.27–1.9) |
| >22 | 23 (46%) | 81 (40%) | 1.4 (0.60–3.4) |
| Meary’s angle* (in degrees) | |||
| <5 | 16 (32%) | 65 (32%) | 1.0 (referent) |
| ≥5 to 12 | 18 (36%) | 72 (36%) | 1.0 (0.71–1.4) |
| >12 | 16 (32%) | 63 (32%) | 1.0 (0.70–1.5) |
Odds ratios and 95% CIs are given with respect to the referent group and adjusted for other variables in the model.
*
Body mass index and radiographic measurements were analyzed as continuous variables. The data are presented in tertiles in the table.
†
p<0.001.
¥
p<0.01.