Table 1.
Lower extremity orthotic analysis | Spinal orthotic analysis | Lower extremity prosthetic analysis | ||||
---|---|---|---|---|---|---|
Study group | Comparison group | Study group | Comparison group | Study group | Comparison group | |
Number of patients with O&P service and etiological diagnosis included in custom cohort | 239,655 | 255,156 | 224,994 | 240,609 | 13,823 | 5959 |
Number of pairs after propensity score match | 43,487 | 43,487 | 34,573 | 34,573 | 545 | 545 |
Percent of patients represented in the effective sample | 18.1% | 17.0% | 15.4% | 14.4% | 3.9% | 9.1% |
Source: Dobson | DaVanzo analysis of custom cohort Standard Analytic Files (2011–2014) for Medicare beneficiaries who received O&P services from January 1, 2012 through June 30, 2013 (and matched comparisons), according to custom cohort database definition