Table 5.
Coding of patients with CKD in control and intervention practices
| Time Point | Control, n (%) | Intervention, n (%) | OR Adjusted for Baseline (95% CI) | P Value | ||
|---|---|---|---|---|---|---|
| Baseline | 11,706 | (100.0) | 11,651 | (100.0) | ||
| Correct | 6785 | (58.0) | 7268 | (62.4) | — | — |
| Not coded | 4313 | (36.8) | 3719 | (31.9) | — | — |
| 6 mo | 12,160 | (100.0) | 12,215 | (100.0) | ||
| Correct | 7069 | (58.1) | 7778 | (63.7) | 1.94 (1.09 to 3.46) | 0.03 |
| Not coded | 4461 | (36.7) | 3742 | (30.6) | 0.60 (0.39 to 0.91) | 0.02 |
| 12 mo | 12,568 | (100.0) | 13,312 | (100.0) | ||
| Correct | 7317 | (58.2) | 8595 | (64.6) | 1.94 (1.17 to 3.22) | 0.01 |
| Not coded | 4590 | (36.5) | 3963 | (29.8) | 0.55 (0.36 to 0.85) | <0.01 |
| 18 mo | 12,985 | (100.0) | 13,494 | (100.0) | ||
| Correct | 7808 | (60.1) | 8818 | (65.3) | 1.55 (0.94 to 2.58) | 0.09 |
| Not coded | 4486 | (34.5) | 3890 | (28.8) | 0.63 (0.39 to 1.01) | 0.05 |
| 24 mo | 13,398 | (100.0) | 13,855 | (100.0) | ||
| Correct | 8067 | (60.2) | 9239 | (66.7) | 1.80 (1.07 to 3.01) | 0.03 |
| Not coded | 4605 | (34.4) | 3798 | (27.4) | 0.54 (0.33 to 0.88) | 0.01 |
| 30 mo | 13,413 | (100.0) | 14,116 | (100.0) | ||
| Correct | 8070 | (60.2) | 9661 | (68.4) | 1.93 (1.19 to 3.14) | <0.01 |
| Not coded | 4584 | (34.2) | 3621 | (25.7) | 0.51 (0.31 to 0.81) | <0.01 |
| 36 mo | 13,760 | (100.0) | 14,179 | (100.0) | ||
| Correct | 8475 | (61.6) | 10,046 | (70.9) | 1.88 (1.22 to 2.90) | 0.004 |
| Not coded | 4473 | (32.5) | 3275 | (23.1) | 0.51 (0.33 to 0.79) | 0.002 |
| 42 mo | 6997 | (100.0) | 11,686 | (100.0) | ||
| Correct | 4398 | (62.9) | 8238 | (70.5) | 1.84 (1.01 to 3.36) | 0.05 |
| Not coded | 2143 | (30.6) | 2698 | (23.1) | 0.56 (0.28 to 1.10) | 0.09 |
Not coded patients met the definition of CKD on the basis of eGFR criteria but were not coded as such in clinical information technology systems. Correctly coded patients with CKD had been identified on the basis of eGFR criteria and had been correctly coded as such. OR, odds ratio; 95% CI, 95% confidence interval; —, not calculated.