Table 1 Numbers of patients and hospitals undergoing ankle arthrodesis or total ankle arthroplasty

Ankle arthrodesis

152 (80.4 %)

223 (87.5 %)

183 (85.1 %)

293 (88.3 %)

440 (82.4 %)

524 (82.1 %)

495 (80.9 %)

2310 (83.2 %)

Total ankle arthroplasty

37 (19.6 %)

32 (12.5 %)

32 (14.9 %)

39 (11.7 %)

94 (17.6 %)

114 (17.9 %)

117 (19.1 %)

465 (16.8 %)

Total

189

255

215

332

534

638

612

2775

Data collection periods (months)

6

6

6

9

12

12

12

—

Number of enrolled hospitals in DPC

898

855

901

980

1075

1057

1061

—

Number of admissions in DPC (million)

2.65

2.81

2.78

4.95

7.14

6.85

7.11

34.29