Table 4.
eGFR reporting prevalence by serum creatinine test volume (2005), by laboratory strata
| Volume quartiles@ | Top 5% volume laboratories | |||||||
|---|---|---|---|---|---|---|---|---|
| Stratum | Quartile 1 % reporting eGFR (95% CI) | Quartile 2 % reporting eGFR (95% CI) | Quartile 3 % reporting eGFR (95% CI) | Quartile 4 % reporting eGFR (95% CI) | Total (n)* | p-value** | Yes % § (95% CI) | Total (n) |
| Physician office | 22.4 (14.1 – 30.6) | 15.3 (8.1 – 22.5) | 27.6 (18.8 – 36.4) | 43.7 (33.9 – 53.4) | 344 | < 0.001
< 0.001 |
31.6 (10.1 – 53.0) | 19 |
| Hospital | 25.3 (19.6 – 30.9) | 38.1 (31.9 – 44.4) | 52.2 (45.5 – 59.0) | 59.0 (52.9 – 65.1) | 776 | < 0.001
< 0.001 |
64.1 (49.7 – 78.5) | 39 |
| Independent | 24.7 (17.2 – 32.3) | 28.0 (20.3 – 35.6) | 35.4 (26.7 – 44.1) | 65.3 (57.5 – 73.2) | 365 | < 0.001
< 0.001 |
86.4 (73.3 – 99.4) | 22 |
| Community clinic | 31.6 (20.7 – 42.5) | 41.7 (31.4 – 52.0) | 45.2 (34.1 – 56.4) | 60.9 (50.5 – 71.3) | 174 | 0.06
0.03 |
66.7 (38.6 – 94.8) | 9 |
| Health fair Insurance Public health | 0.0 | 33.3 (3.3 – 63.4) | 100 | 66.7 (36.6 – 96.7) | 10 | NA
0.09 |
0.0 | 1 |
| Other | 20.3 (12.3 – 28.2) | 43.4 (33.8 – 53.1) | 47.3 (37.4 – 57.2) | 53.9 (44.2– 63.7) | 300 | < 0.001
0.001 |
75.0 (54.4 – 95.6) | 16 |
|
| ||||||||
| Overall %*** | 24.1 (20.4 – 27.7) | 31.9 (28.1 – 35.8) | 42.8 (38.5 – 47.1) | 55.6 (51.5 – 59.7) | 1969 | < 0.001
< 0.001 |
59.7 (51.0 – 68.5) | 106 |
|
| ||||||||
| @Quartile definitions | ||||||||
|
| ||||||||
| Stratum | 1st | 2nd | 3rd | 4th | ||||
|
| ||||||||
| Physician office | < 1,100 | 1,100 – 3,099 | 3,100 – 9,999 | ≥ 10,000 | ||||
| Hospital | < 5,500 | 5,500 – 18,199 | 18,200 – 49,999 | ≥ 50,000 | ||||
| Independent | < 2,400 | 2,400 – 7,799 | 7,800 – 29,999 | ≥ 30,000 | ||||
| Community clinic | < 1,000 | 1,000 – 3,599 | 3,600 – 12,999 | ≥ 13,000 | ||||
| Health fair Insurance Public health | < 2,000 | 2,000 – 40,699 | 40,700 – 199,999 | ≥ 200,000 | ||||
| Other | < 1,800 | 1,800 – 7,099 | 7,100 – 42,999 | ≥ 46,000 | ||||
*
Volume not available for 524 laboratories.
**
First p-value is for comparison of the 4 groups; second is for comparison of < median versus ≥median. Comparisons are made within each stratum and pooled over strata.
§
P = 0.01 for comparison of percent yes over stratum (excluding health fair/insurance/public health category). Includes only labs with a volume in the top 5% for each stratum.
***
Weighted percentage.