Table 5. Baseline characteristics of stone formers with and without a 24-hour urine collection in the top and bottom decile of VHA facilities that administer 24-hour urine testing.
| Characteristics | Top Decile | Bottom Decile | p-valuea | ||||
|---|---|---|---|---|---|---|---|
| Total | With 24-hour | Without 24-hour | Total | With 24-hour | Without 24-hour | ||
| (n = 9835) | (n = 3052) | (n = 6783) | (n = 7751) | (n = 241) | (n = 7510) | ||
| Age (mean ± SD) | 60.6 ± 13.5 | 58.6 ± 12 | 61.5 ± 14.1 | 60.3 ± 13.6 | 55.5 ± 13.1 | 60.4 ± 13.6 | 0.79 |
| Sex (n,%) | |||||||
| Male | 9268 (94.2) | 2853 (93.5) | 6415 (94.6) | 7329 (94.6) | 217 (90) | 7112 (94.7) | 0.36 |
| Female | 567 (5.8) | 199 (6.5) | 368 (5.4) | 422 (5.4) | 24 (10) | 398 (5.3) | |
| Race (n,%) | |||||||
| White | 7437 (75.6) | 2395 (78.5) | 5042 (74.3) | 5415 (69.9) | 178 (73.9) | 5237 (69.7) | <0.001 |
| Black | 796 (8.1) | 188 (6.2) | 608 (9) | 934 (12.1) | 28 (11.6) | 906 (12.1) | |
| Other/Unknown | 1601 (16.3) | 469 (15.4) | 1133 (16.7) | 1402 (18) | 35 (14.5) | 1367 (18.2) | |
| Stone Diagnosis (n,%) | |||||||
| Inpatient | 1067 (10.8) | 242 (7.9) | 825 (12.2) | 844 (10.9) | 18 (7.5) | 826 (11) | <0.001 |
| Outpatient | 6740 (68.5) | 2309 (75.7) | 4431 (65.3) | 5114 (66) | 181 (75.1) | 4933 (65.7) | |
| Procedure | 2028 (20.6) | 501(16.4) | 1527 (22.5) | 1793 (23.1) | 42 (17.4) | 1751 (23.3) | |
| Number of procedures (mean ± SD) | 0.8 ± 1.4 | 1.2 ± 1.7 | 0.6 ± 1.2 | 0.7 ± 1.3 | 1.5 ± 2.1 | 0.7 ± 1.2 | <0.001 |
| Charlson Comorbidity Index (mean ± SD) | 2.3 ± 2.5 | 1.9 ± 2.1 | 2.4 ± 2.6 | 2.3 ± 2.5 | 1.9 ± 2.2 | 2.3 ± 2.6 | 0.13 |
| Region (n,%) | |||||||
| Midwest | 1219 (12.4) | 292 (9.6) | 927 (13.7) | 1270 (16.4) | 31 (12.9) | 1239 (16.5) | <0.001 |
| Northeast | 1285 (13.1) | 363 (11.89) | 922 (13.6) | 1405 (18.1) | 54 (22.4) | 1351(18) | |
| Southeast | 2870 (29.2) | 969 (31.8) | 1901 (28) | 3560 (45.9) | 108 (44.8) | 3452(46) | |
| West | 4461 (45.4) | 1428 (46.8) | 3033 (44.7) | 1516 (19.6) | 48 (19.9) | 1468 (19.6) |
ap-value compares characteristics between the total population in the bottom and top decile of facilities