Table 2 Univariable hazard ratios for each type of attrition in the initial phase
From: Factors associated with attrition in a longitudinal online study: results from the HaBIDS panel
Discontinuation | Withdrawal | |||
|---|---|---|---|---|
HR (95% CI) | p-value | HR (95% CI) | p-value | |
Age at baseline (per 10 years increase) | 0.81 (0.73, 0.89) | <0.001 | 1.24 (1.04, 1.47) | 0.02 |
Sex | ||||
Male | Reference | Reference | ||
Female | 0.91 (0.69, 1.21) | 0.54 | 0.84 (0.52, 1.34) | 0.46 |
Marital status | ||||
Married | Reference | Reference | ||
Unmarried | 1.32 (0.97, 1.79) | 0.08 | 0.72 (0.41, 1.28) | 0.26 |
Divorced/widowed | 1.18 (0.73, 1.93) | 0.50 | 0.88 (0.38, 2.06) | 0.77 |
Highest completed educational level | ||||
Lower secondary education or apprenticeship | 1.41 (0.52, 3.84) | 0.50 | 2.44 (0.58, 10.31) | 0.22 |
Still at upper secondary school | 0.89 (0.62, 1.29) | 0.54 | 1.56 (0.89, 2.76) | 0.12 |
University entrance qualification | 1.13 (0.81, 1.56) | 0.48 | 1.07 (0.59, 1.95) | 0.82 |
University degree | Reference | Reference | ||
Frequency of Internet usage | ||||
Daily | Reference | Reference | ||
Less than daily | 1.23 (0.91, 1.67) | 0.19 | 2.03 (1.26, 3.27) | 0.004 |
Self-rated health status | ||||
Fair/poor | 0.93 (0.55, 1.59) | 0.80 | 1.57 (0.67, 3.68) | 0.30 |
Good | 1.09 (0.81, 1.47) | 0.56 | 1.73 (1.03, 2.92) | 0.04 |
Excellent/very good | Reference | Reference | ||
WHO-5 well-being index (per 10 points increase) | 0.96 (0.89, 1.03) | 0.24 | 0.96 (0.85, 1.09) | 0.57 |
PSS score (per 1 point increase) | 1.07 (1.02, 1.12) | 0.002 | 0.97 (0.89, 1.05) | 0.46 |
ID-Screen (per 1 point increase) | 1.03 (0.99, 1.07) | 0.10 | 1.01 (0.95, 1.08) | 0.73 |
Time between invitation and return of the filled informed consent form (per week) | 1.1 (1.04, 1.17) | <0.001 | 0.98 (0.82, 1.16) | 0.78 |
Had to be reminded to fill in the first online questionnaire (A) | ||||
Yes | 1.85 (1.27, 2.7) | 0.001 | 0.82 (0.33, 2.05) | 0.68 |
No | Reference | Reference | ||