Table 1.
Participants’ baseline characteristics as determinants of repeat participation in a Web-based health behavior change program (bold numbers indicate significant OR values), N = 6272
| Repeat Participation (%) | Crude Effect | Adjusted Effect* | ||||
| OR | 95% CI | OR | 95% CI | |||
| Gender | ||||||
| Male (n = 2132) | 11.7 | 1.00 | – | 1.00 | – | |
| Female (n = 4140) | 11.2 | 0.95 | 0.80-1.11 | 0.99 | 0.83-1.18 | |
| Age (years) | ||||||
| 15-20 (n = 846) | 9.3 | 1.00 | – | 1.00 | – | |
| 21-30 (n = 1717) | 8.6 | 0.92 | 0.69-1.22 | 0.97 | 0.72-1.32 | |
| 31-40 (n = 1449) | 12.0 | 1.33 | 1.00-1.75 | 1.31 | 0.97-1.79 | |
| 41-50 (n = 1281) | 13.1 | 1.47 | 1.11-1.95 | 1.40 | 1.02-1.91 | |
| 51-60 (n = 791) | 14.2 | 1.60 | 1.18-2.18 | 1.43 | 1.02-2.01 | |
| 61 and older (n = 188) | 16.6 | 1.92 | 1.23-3.03 | 1.68 | 1.03-2.72 | |
| Education level | ||||||
| Very low (n = 159) | 12.6 | 1.00 | – | 1.00 | – | |
| Low (n = 421) | 12.6 | 1.00 | 0.58-1.74 | 0.90 | 0.51-1.58 | |
| Intermediate (n = 1838) | 11.8 | 0.93 | 0.57-1.52 | 0.88 | 0.53-1.46 | |
| High (n = 1082) | 10.8 | 0.84 | 0.51-1.40 | 0.83 | 0.49-1.39 | |
| Very high (n = 2272) | 11.0 | 0.86 | 0.53-1.39 | 0.77 | 0.46-1.27 | |
| Body mass index (kg/m2) | ||||||
| ≤ 25 (n = 4044) | 10.4 | 1.00 | – | 1.00 | – | |
| 25.01-30 (n = 1662) | 12.3 | 1.20 | 1.01-1.44 | 1.11 | 0.92-1.33 | |
| > 30 (n = 566) | 15.2 | 1.54 | 1.20-1.88 | 1.41 | 1.09-1.82 | |
| Smoking status | ||||||
| Current smoker (n = 1343) | 8.1 | 1.00 | – | 1.00 | – | |
| Former smoker (n = 2092) | 13.2 | 1.73 | 1.37-2.18 | 1.49 | 1.17-1.89 | |
| Never smoker (n = 2837) | 11.5 | 1.47 | 1.17-1.84 | 1.44 | 1.14-1.82 | |
| Physical activity, moderate intensity† | ||||||
| Insufficient (n = 3009) | 9.9 | 1.00 | – | 1.00 | –- | |
| Sufficient (n = 3263) | 12.7 | 1.31 | 1.12-1.54 | 1.23 | 1.04-1.46 | |
| Physical activity, high intensity‡ | ||||||
| Insufficient (n = 3377) | 10.4 | 1.00 | – | 1.00 | – | |
| Sufficient (n = 2895) | 12.5 | 1.23 | 1.05-1.44 | 1.11 | 0.94-1.31 | |
| Vegetable consumption§ | ||||||
| Insufficient (n = 5409) | 10.9 | 1.00 | – | 1.00 | – | |
| Sufficient (n = 863) | 14.5 | 1.39 | 1.13-1.71 | 1.26 | 1.01-1.57 | |
| Fruit consumption|| | ||||||
| Insufficient (n = 4919) | 10.8 | 1.00 | – | 1.00 | – | |
| Sufficient (n = 1353) | 13.2 | 1.26 | 1.05-1.50 | 1.06 | 0.87-1.28 | |
| Alcohol consumption¶ | ||||||
| Excessive (n = 420) | 11.2 | 1.00 | – | 1.00 | – | |
| Moderate or none (n = 5852) | 11.4 | 0.98 | 0.72-1.35 | 1.02 | 0.74-1.41 | |
*The regression model contained repeat participation (yes/no) as the dependent variable and gender, age, education level, body mass index, smoking status, physical activity (moderate and high intensity), fruit consumption, vegetable consumption, and alcohol consumption as independent variables.
†Current guidelines in The Netherlands recommend a total of at least 30 minutes of physical activity of moderate intensity at least 5 days per week.
‡Current guidelines in The Netherlands recommend at least 20 consecutive minutes of physical activity of high intensity at least 3 days per week.
§Current guidelines in The Netherlands recommend at least 200 g of vegetables per day.
||Current guidelines in The Netherlands recommend at least 2 pieces of fruit per day.
¶Current guidelines in The Netherlands recommend a maximum of 15 alcoholic drinks per week for women and 21 drinks per week for men.