Table 3.
Agreement between Self-reported Co-Morbidity and Administrative Measure of Co-Morbidity
| Co-morbidity | Self-Report | Administrative Algorithms |
Present in Both Data Sources | Present in Either Data Source | Kappa† (95% CI) |
McNemar's†† p-value |
|---|---|---|---|---|---|---|
| Hypertension n (%) |
754 (35.1) |
714 (33.2) |
539 (25.1) |
929 (43.2) |
0.60 (0.52, 0.63) |
0.0428 |
| Diabetes n (%) |
289 (13.4) |
238 (11.1) |
214 (10.0) |
313 (14.6) |
0.79 (0.75, 0.83) |
<0.001 |
| Asthma n (%) |
358 (16.7) |
247 (11.5) |
168 (7.8) |
437 (20.3) |
0.49 (0.43, 0.54) |
<0.001 |
| Myocardial Infarction n (%) |
194 (9.0) |
53 (2.5) |
37 (1.7) |
210 (9.8) |
0.27 (0.20, 0.35) |
<0.001 |
| Heart Failure n (%) |
72 (3.4) |
29 (1.3) |
15 (0.7) |
86 (4.0) |
0.28 (0.17, 0.40) |
<0.001 |
| Stroke n (%) |
62 (2.9) |
9 (0.4) |
8 (0.4) |
63 (2.9) |
0.22 (0.09, 0.35) |
<0.001 |
| No defined Algorithm | Self-Report | No defined Algorithm* | Both | Either | Kappa (95% CI) |
McNemar's p value |
| Depression n (%) |
581 (27.0) |
573 (26.7) |
364 (16.9) |
790 (36.8) |
0.50 (0.45, 0.54) |
0.6983 |
| Cardiac Arrhythmia n (%) |
123 (5.7) |
654 (30.4) |
86 (4.0) |
691 (32.2) |
0.14 (0.10, 0.17) |
<0.001 |
| COPD n (%) |
67 (3.1) |
77 (3.6) |
24 (1.1) |
120 (5.6) |
0.31 (0.21, 0.41) |
0.3074 |
* At least one physician claim or hospitalization diagnosis in 2 years.
† The Kappa statistic is an index of the degree of agreement between two raters.
†† McNemar's test of paired proportions is a test of marginal homogeneity that compares the agreement between discordant pairs.