Table 2 Patient characteristics by socioeconomic status quintile * All p-values based on Wald chi-square tests.
From: Disparities in the use of ambulatory surgical centers: a cross sectional study
| Â | Socioeconomic Status (Quintiles) | p-value* | ||||
|---|---|---|---|---|---|---|
| Â | 1 (Lowest) | 2 | 3 | 4 | 5 (Highest) | Â |
Number of Discharges | 208557 (18%) | 222873 (20%) | 236339 (21%) | 233973 (21%) | 236385 (21%) | Â |
No. at ASC | 124183 (60%) | 143567 (64%) | 157743 (67%) | 151954 (65%) | 152636 (65%) | <0.001 |
Procedure | Â | Â | Â | Â | Â | <0.001 |
Cataract Surgery | 49360 (24%) | 52094 (23%) | 55089 (23%) | 53681 (23%) | 49351 (21%) | Â |
Urologic | 26881 (13%) | 27327 (12%) | 29075 (12%) | 28349 (12%) | 27520 (12%) | Â |
Upper GI | 35659 (17%) | 35800 (16%) | 37711 (16%) | 35453 (15%) | 32941 (14%) | Â |
Lower GI | 87010 (42%) | 96355 (43%) | 102946 (44%) | 104226 (45%) | 113070 (48%) | Â |
Knee Arthroscopy | 9647 5%) | 11297 (5%) | 11518 (5%) | 12264 (5%) | 13503 (6%) | Â |
Age | Â | Â | Â | Â | Â | <0.001 |
≤ 19 | 7750 (4%) | 6442 (3%) | 5659 (2%) | 5489 (2%) | 6064 (3%) |  |
20–39 | 16006 (8%) | 16211 (7%) | 15474 (7%) | 15600 (7%) | 14902 (6%) |  |
40–59 | 62732 (30%) | 64420 (29%) | 66793 (28%) | 67199 (29%) | 75172 (32%) |  |
60–79 | 100871 (48%) | 108634 (49%) | 117674 (50%) | 113312 (48%) | 110414 (47%) |  |
80+ | 21198 (10%) | 27166 (12%) | 30739 (13%) | 32373 (14%) | 29833 (13%) | Â |
Race/Ethnicity | Â | Â | Â | Â | Â | <0.001 |
White | 130718 (63%) | 174813 (79%) | 197407 (85%) | 197427 (85%) | 204753 (88%) | Â |
Black | 35198 (17%) | 16886 (8%) | 10097 (4%) | 8661 (4%) | 5981 (3%) | Â |
Hispanic | 34416 (17%) | 22541 (10%) | 20216 (9%) | 18205 (8%) | 13576 (6%) | Â |
Other | 5555 (3%) | 5930 (3%) | 5805 (2%) | 6638 (3%) | 7620 (3%) | Â |
Insurance Status | Â | Â | Â | Â | Â | <0.001 |
Medicare/Commercial | 180433 (87%) | 201681 (91%) | 218819 (93%) | 218483 (93%) | 224437 (95%) | Â |
Self Pay/No Insurance | 5741 (3%) | 4790 (2%) | 4027 (2%) | 4251 (2%) | 4000 (2%) | Â |
Medicaid/Other Governmental | 22361 (11%) | 16361 (7%) | 13448 (6%) | 11194 (5%) | 7902 (3%) | Â |
No. Female | 114616 (55%) | 120988 (54%) | 126251 (53%) | 123491 (53%) | 120934 (51%) | <0.001 |
Comorbidity | Â | Â | Â | Â | Â | <0.001 |
0 | 165450 (79%) | 182736 (82%) | 194925 (82%) | 194940 (83%) | 199529 (84%) | Â |
1 | 26321 (13%) | 25967 (12%) | 26726 (11%) | 26442 (11%) | 25436 (11%) | Â |
2 | 12134 (6%) | 10531 (5%) | 10763 (5%) | 9463 (4%) | 8691 (4%) | Â |
3+ | 4651 (2%) | 3639 (1%) | 3925 (2%) | 3128 (2%) | 2729 (1%) | Â |
Urban/Rural | Â | Â | Â | Â | Â | <0.001 |
Non-Urban adjacent to urban (ref) | 108704 (52%) | 121515 (55%) | 122051 (52%) | 130293 (56%) | 152543 (65%) | Â |
Large Metropolitan | 56499 (27%) | 86496 (39%) | 101347 (43%) | 96531 (41%) | 83842 (35%) | Â |
Small Metropolitan | 25063 (12%) | 13396 (6%) | 12330 (5%) | 6322 (2%) | 0 | Â |
Micropolitan | 18291 (9%) | 1466 1%) | 611 (<1%) | 827 (<1%) | 0 | Â |