Table 2.
Prevalence rates of observed comorbidities in patients in the linked dataset
| Linked dataset (N = 536): percentage of patients with selected comorbidities | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Primary data collected by GPs or pneumologistsa | Primary data collected by GPs | Primary data collected by pneumologists | |||||||
| N = 536 | N = 69 | N = 467 | |||||||
| Comorbidities | PD | CD | Agreementa | PD | CD | Agreementa | PD | CD | Agreementa |
| Diabetes (Type 1 or 2) | 22.2% | 35.3% | 87.5% (κ = 0.63) |
43.5% | 42.0% | 98.5% (κ = 0.91) |
19.1% | 34.3% | 84.8% (κ = 0.58) |
| Depression | 6.7% | 29.3% | 77.7% (κ = 0.15) |
15.9% | 26.1% | 89.8% (κ = 0.59) |
5.4% | 29.8% | 75.6% (κ = 0.09) |
| Osteoporosis | 8.0% | 18.5% | 90.5% (κ = 0.43) |
20.3% | 23.2% | 97.1% (κ = 0.66) |
6.2% | 17.8% | 88.4% (κ = 0.36) |
| Hypertension | 45.3% | 84.0% | 63.6% (κ = 0.28) |
62.3% | 87.0% | 75.3% (κ = 0.40) |
42.8% | 83.5% | 59.3% (κ = 0.26) |
CD claims dataset, GP general practitioner, PD primary dataset
Significance tests for differences in the percentage of patients diagnosed by GPs and pneumologists in the two datasets: diabetes: p = 0.030; depression: p = 0.007; osteoporosis: p = 0.129; hypertension: p = 0.005
PD values represent the percentage of patients with a particular comorbidity reported in primary data. CD values represent the percentage of patients with a particular comorbidity reported in claims data. Agreement was calculated at a patient level in each of the subgroups (overall linked dataset, primary data collected by GPs, primary data collected by pneumologists) as follows: percent agreement = 100 * ([number of patients in the subgroup with the comorbidity reported in both primary and claims data] + [number of patients in the subgroup with the comorbidity not reported in either primary or claims data]) / (total number of patients in the subgroup)
aIncludes Cohen’s kappa coefficient for agreement between comorbidities recorded in the primary and claims datasets