Response | Total | ||
Study group | Control group | ||
Own tel no | 176 (92.1%) | 187 (90.8%) | 363 (91.4%) |
No | 15 (7.9%) | 19 (9.2%) | 34 (8.6%) |
Total | 191 (48.1%) | 206 (51.9%) | 397 (100.0%) |