Table 7 Weighted regression for candidate predictors of data completeness (29 studies)
Design Choice | Beta-value | Standard error | p |
|---|---|---|---|
2.1.1 Protocol | |||
 Signal contingent | -11.82 |  |  |
 Time contingent vs Signal contingent | -0.25 | 4.24 | 0.010 |
 Hybrid vs signal contingent |  | 5.18 | 0.962 |
2.2.4 Other data collected | |||
 Yes | 19.26 |  |  |
 No vs yes |  | 3.57 |  < 0.001 |
2.3.1 Measurement duration (hours) | -2.16 | 0.94 | 0.033 |
2.3.4 Length of time in study (days) | -0.438 | 0.18 | 0.021 |
3.2.2 Accepted response rate (% of questionnaires) | 68.07 | 28.70 | 0.035 |
3.3.2 Contact with research team | |||
 Researcher initiated | -17.49 |  |  |
 Participant initiated vs Researcher initiated | -4.84 | 5.06 | 0.004 |
 Both vs Researcher initiated |  | 7.85 | 0.549 |