Table 1 Summary statistics on reporting of visit irregularity, predictors of visit times, and methods of analysis
Outcomes of Interest | N (out of 44) | % |
|---|---|---|
Study design | ||
Prospective | 10 | 23 |
Retrospective | 31 | 70 |
Unclear | 3 | 7 |
Clearly defined end of study | ||
Yes | 34 | 77 |
No | 10 | 23 |
Comparison of those with and without full follow-up among studies with a clearly defined end of follow-up | (out of 34) | |
Yes | 5 | 15 |
No | 24 | 71 |
Not Applicable (all participants had full follow-up) | 5 | 15 |
Method of analysis | ||
Linear or logistic regression | 8 | 18 |
Gaussian process regression | 1 | 2 |
Repeated measures | 11 | 25 |
Mixed model or generalized mixed model | 20 | 45 |
GEE | 3 | 7 |
IIW-GEE | 1 | 2 |
Reported summary statistics on | ||
Number of visits per patient | 25 | 57 |
Gaps between visits per patient | 3 | 7 |
Follow-up time per patient | 25 | 57 |
Predictors of visit time assessed | ||
Yes | 2 | 5 |
No | 41 | 93 |
Unclear | 1 | 2 |
Was there a need to account for informative visit times? | ||
Yes | 6 | 14 |
of which | ||
Analysis specifically designed to check for informativeness | 1 (out of 6) | 18 |
Informativeness inferred by reviewers | 5 (out of 6) | 82 |
Unclear | 38 | 86 |
Method used to account for informative visit times for studies with sufficient reporting of an identifiable need | (out of 6) | |
Yes | 1 | 19 |
No | 5 | 81 |