Economic value of orthotic and prosthetic services among medicare beneficiaries: a claims-based retrospective cohort study, 2011–2014

Table 1 Distribution of Pairs (Study Group and Comparison Group Matches)

	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

ISSN: 1743-0003