Table 2.
Characteristics of respondents and nonrespondents in patients treated with percutaneous coronary intervention (PCI)
| Characteristic | Respondents,a n (%) (n=984) | Nonrespondents, n (%) (n=518) | Chi-square test, P |
|---|---|---|---|
| Early other admissionb | 78 (7.9) | 81 (15.6) | <0.001 |
| Cardiac event during follow-up | 85 (8.6) | 63 (12.2) | <0.001 |
| Cardiac admission during follow-up | 319 (32.4) | 207 (40.0) | <0.001 |
| Other admission during follow-up | 332 (33.7) | 197 (38.0) | <0.001 |
| Death during follow-up | 37 (3.8) | 46 (8.9) | <0.001 |
| Comorbidity (Charlson Index >1) | 165 (16.8) | 123 (23.8) | 0.003 |
| LVEF <55%c | 107 (10.9) | 90 (17.4) | 0.001 |
Notes:
a
In this case we defined respondents as patients with complete SF-12, others may have answered the questionnaire, but one or more items were missing
b
noncardiac hospital admission between PCI and the answering of questionnaire
c
109 had missing LVEF in the West Denmark heart registry.
Abbreviation: LVEF, left-ventricular ejection fraction.