TABLE IV.

Shoulder Arthroscopy Multivariable Regression Results^*

	Probability of Selecting Ambulatory Surgery Center	Procedure Price Paid (Percent Difference)	Procedure Price Paid (Dollar Difference)	Probability of Ninety-Day Complication
CalPERS × 2013	0.0995† ± 0.0343	−17.02‡ ± 8.549	−1336‡ ± 605.9	0.000999 ± 0.00700
CalPERS × 2012	0.0444 ± 0.0320	−21.87† ± 7.447	−1768† ± 547.6	−0.00493 ± 0.00654
CalPERS × 2010	−0.0219 ± 0.0308	−0.718 ± 5.346	−51.64 ± 373.3	0.00638 ± 0.00793
CalPERS × 2009	0.0382 ± 0.0318	3.144 ± 7.493	221.8 ± 517.5	0.00302 ± 0.00798
CalPERS	−0.0401§ ± 0.0235	9.999‡ ± 4.162	682.7‡ ± 294.8	−0.00150 ± 0.00532
2013	0.00810 ± 0.0260	9.111‡ ± 4.082	624.6‡ ± 281.9	−0.00198 ± 0.00218
2012	−0.00249 ± 0.0180	6.554‡ ± 3.059	454.8‡ ± 213.8	0.000447 ± 0.00242
2011	Reference	Reference	Reference	Reference
2010	−0.0158 ± 0.0151	−1.547 ± 2.591	−111.7 ± 183.5	−0.00187 ± 0.00228
2009	−0.0322 ± 0.0212	−8.424† ± 3.302	−630.4† ± 242.0	0.00144 ± 0.00242
Male patients	−0.00362 ± 0.00771	8.332† ± 1.550	573.3† ± 119.0	0.00138 ± 0.00143
Charlson Comorbidity Index	−0.238† ± 0.0570	12.55§ ± 7.239	846.8§ ± 500.5	0.00128 ± 0.00639
Age in years
30 to 39	−0.0373§ ± 0.0207	−0.105 ± 4.086	−6.807 ± 260.7	8.23×10-5 ± 0.00270
40 to 49	−0.0230 ± 0.0224	6.955§ ± 3.697	452.9§ ± 241.5	0.00142 ± 0.00224
50 to 59	−0.0196 ± 0.0230	11.60† ± 3.530	755.6† ± 233.3	0.00508‡ ± 0.00217
60 to 64	−0.0317 ± 0.0235	18.53† ± 3.933	1206† ± 277.9	0.00864† ± 0.00274

^*The values are given as the mean and the standard error based on 20,142 observations in each group.

^†Significant at p < 0.01.

^‡Significant at p < 0.05.

^§Not significant at p < 0.1.