Table 1.
Rates of follow up by baseline risk characteristics
| Variables | 4 months
|
12 months
|
|||
|---|---|---|---|---|---|
| Rate (%) | % difference (95% CI) | Rate (%) | % difference (95% CI) | ||
| No of patients | |||||
| Intervention (n=316) | 204 (65) | 9.9 (−1.3 to 21.0) | 169 (54) | 8.4 (−4.7 to 21.5) | |
| Control (n=567) | 422 (74) | 351 (62) | |||
| Cigarette smoking | |||||
| Non-smokers: | |||||
| Intervention (n=192) | 145 (76) | 6.4 (−4.8 to 17.6) | 129 (67) | 3.5 (−10.5 to 17.6) | |
| Control (n=287) | 235 (82) | 203 (71) | |||
| Smokers: | |||||
| Intervention (n=124) | 59 (48) | 19.2 (4.1 to 34.4) | 40 (32) | 20.6 (7.9 to 33.3) | |
| Control (n=280) | 187 (67) | 148 (53) | |||
| Cholesterol concentration (mmol/l) | |||||
| <6.5: | |||||
| Intervention (n=161) | 89 (55) | 18.1 (6.7 to 29.4) | 68 (42) | 15.7 (2.7 to 28.7) | |
| Control (n=345) | 253 (73) | 200 (58) | |||
| 6.5-9.0: | |||||
| Intervention (n=153) | 115 (75) | 3.6 (−8.9 to 16.2) | 100 (65) | 5.4 (−8.5 to 19.3) | |
| Control (n=212) | 167 (79) | 150 (71) | |||
| Body mass index and exercise | |||||
| <25: | |||||
| Intervention (n=64) | 36 (56.3) | 9.6 (−7.0 to 26.1) | 33 (51.6) | 0.1 (−14.2 to 14.4) | |
| Control (n=120) | 79 (65.8) | 62 (51.7) | |||
| 25-35 with low physical activity: | |||||
| Intervention (n=252) | 168 (66.7) | 10.1 (−0.8 to 20.9) | 136 (54.0) | 10.7 (−4.3 to 25.7) | |
| Control (n=447) | 343 (76.7) | 289 (64.7) | |||
Positive differences indicate greater proportions of control than intervention patients retained in study.