Table 2

Patient characteristics by socioeconomic status quintile * All p-values based on Wald chi-square tests.

Socioeconomic Status (Quintiles)

p-value*


1 (Lowest)

2

3

4

5 (Highest)


Number of Discharges

208557

(18%)

222873

(20%)

236339

(21%)

233973

(21%)

236385

(21%)


No. at ASC

124183 (60%)

143567 (64%)

157743 (67%)

151954 (65%)

152636 (65%)

<0.001


Procedure

<0.001


Cataract Surgery

49360 (24%)

52094 (23%)

55089 (23%)

53681 (23%)

49351 (21%)


Urologic

26881 (13%)

27327 (12%)

29075 (12%)

28349 (12%)

27520 (12%)


Upper GI

35659 (17%)

35800 (16%)

37711 (16%)

35453 (15%)

32941 (14%)


Lower GI

87010 (42%)

96355 (43%)

102946 (44%)

104226 (45%)

113070 (48%)


Knee Arthroscopy

9647 5%)

11297 (5%)

11518 (5%)

12264 (5%)

13503 (6%)


Age

<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%)


Race/Ethnicity

<0.001


White

130718 (63%)

174813 (79%)

197407 (85%)

197427 (85%)

204753 (88%)


Black

35198 (17%)

16886 (8%)

10097 (4%)

8661 (4%)

5981 (3%)


Hispanic

34416 (17%)

22541 (10%)

20216 (9%)

18205 (8%)

13576 (6%)


Other

5555 (3%)

5930 (3%)

5805 (2%)

6638 (3%)

7620 (3%)


Insurance Status

<0.001


Medicare/Commercial

180433 (87%)

201681 (91%)

218819 (93%)

218483 (93%)

224437 (95%)


Self Pay/No Insurance

5741 (3%)

4790 (2%)

4027 (2%)

4251 (2%)

4000 (2%)


Medicaid/Other Governmental

22361 (11%)

16361 (7%)

13448 (6%)

11194 (5%)

7902 (3%)


No. Female

114616 (55%)

120988 (54%)

126251 (53%)

123491 (53%)

120934 (51%)

<0.001


Comorbidity

<0.001


0

165450 (79%)

182736 (82%)

194925 (82%)

194940 (83%)

199529 (84%)


1

26321 (13%)

25967 (12%)

26726 (11%)

26442 (11%)

25436 (11%)


2

12134 (6%)

10531 (5%)

10763 (5%)

9463 (4%)

8691 (4%)


3+

4651 (2%)

3639 (1%)

3925 (2%)

3128 (2%)

2729 (1%)


Urban/Rural

<0.001


Non-Urban adjacent to urban (ref)

108704 (52%)

121515 (55%)

122051 (52%)

130293 (56%)

152543 (65%)


Large Metropolitan

56499 (27%)

86496 (39%)

101347 (43%)

96531 (41%)

83842 (35%)


Small Metropolitan

25063 (12%)

13396 (6%)

12330 (5%)

6322 (2%)

0


Micropolitan

18291 (9%)

1466 1%)

611 (<1%)

827 (<1%)

0


* All p-values based on Wald chi-square tests.

Strope et al. BMC Health Services Research 2009 9:121   doi:10.1186/1472-6963-9-121

Open Data