Table 2. Characteristics of the patient cohort by types of surgical procedures (2010-2012).
| In-Situ Release | Transposition | Other treatment | |
|---|---|---|---|
| Patient cohort | |||
| No. of patients | 9833 (86%) | 1161 (10%) | 466 (4%) |
| Age | |||
| Younger than 44 | 1753 (18%) | 236 (20%) | 91 (20%) |
| 45 to 54 | 2445 (25%) | 254 (22%) | 115 (25%) |
| 55 to 65 | 2757 (28%) | 341 (29%) | 112 (24%) |
| Greater than 65 | 2878 (29%) | 330 (28%) | 148 (32%) |
| Sex* | |||
| Male | 4730 (48%) | 627 (54%) | 258 (55%) |
| Female | 5097 (52%) | 533 (46%) | 208 (45%) |
| Missing | 6 (0%) | 1 (0%) | 0 (0%) |
| Race | |||
| White | 7614 (77%) | 994 (86%) | 305 (65%) |
| Black | 843 (9%) | 83 (7%) | 39 (8%) |
| Other | 1228 (12%) | 74 (6%) | 119 (26%) |
| Missing | 148 (2%) | 10 (1%) | 3 (1%) |
| Patient location* | |||
| Large metro | 4957 (50%) | 488 (42%) | 264 (57%) |
| Small metro | 4043 (41%) | 568 (49%) | 182 (39%) |
| Micro | 482 (5%) | 71 (6%) | 15 (3%) |
| Other | 351 (4%) | 34 (3%) | 5 (1%) |
| Median household income | |||
| Quartile 1 | 2342 (24%) | 248 (21%) | 93 (20%) |
| Quartile 2 | 2341 (24%) | 337 (29%) | 105 (23%) |
| Quartile 3 | 2585 (26%) | 307 (26%) | 148 (32%) |
| Quartile 4 | 2362 (24%) | 248 (21%) | 110 (24%) |
| Missing | 203 (2%) | 21 (2%) | 10 (2%) |
| Primary Payer* | |||
| Medicare | 3497 (36%) | 459 (40%) | 171 (37%) |
| Medicaid | 416 (4%) | 67 (6%) | 10 (2%) |
| Private | 4722 (48%) | 504 (43%) | 212 (45%) |
| Other | 1198 (12%) | 131 (11%) | 73 (16%) |
†
Large metro, 1 million residents or more; small metro, less than 1 million residents; micro, adjacent to large or small metro; Other, not metro or micro
*
P value <0.001, from Pearson's Chi-square test of independent distribution