Table 3.
Number of Significant Differences (p<0.05) between Responders and Nonresponders among 20 Comparisons using Baseline Interview Data and 17 Comparisons using Closeout Interview Data
Definition of Pattern | Number of Significant Differences |
|
---|---|---|
Baseline (out of 20) | Closeout (out of 17) | |
1. Fewer than 60 journals | 11 | 4 |
2. Days between first and last journal completion fewer than 730 | 1 | 1 |
3. Proportion of journals that are late > 75% | 3 | 0 |
4. More than 180 days missing | 12 | 4 |
5. Nonresponse rates increase to week 50 but hold steady at response rates between 0.7 and 0.8 | 12 | 5 |
6. Nonresponse rates increase to week 50, hold at about 0.4 | 7 | 3 |
7. High Responders | 9 | 4 |