Table 3.
Means (and standard errors) for interview length in minutes.
| na | Interview length | ||
|---|---|---|---|
| Content | Diet only | 48 | 11.7 (0.4) |
| Physical activity only | 48 | 12.4 (0.2) | |
| Diet & physical activity | 47 | 20.5 (0.8) | |
| Retention Interval | Same-day recall in the afternoon | 71 | 15.3 (0.3) |
| Previous-day recall in the morning | 72 | 14.5 (0.4) | |
| Grade | Third | 71 | 15.5 (0.6) |
| Fifth | 72 | 14.3 (0.1) | |
| Content by Retention Interval | Diet only - Same-day recall in the afternoon | 24 | 11.9 (0.1) |
| Physical activity only - Same-day recall in the afternoon | 24 | 13.1 (0.1) | |
| Diet & physical activity - Same-day recall in the afternoon | 23 | 21.0 (0.8) | |
| Diet only - Previous-day recall in the morning | 24 | 11.6 (0.8) | |
| Physical activity only - Previous-day recall in the morning | 24 | 11.8 (0.4) | |
| Diet & physical activity - Previous-day recall in the morning | 24 | 20.2 (0.7) | |
| Content by Grade | Diet only - Third | 24 | 11.9 (0.4) |
| Physical activity only - Third | 24 | 12.4 (0.5) | |
| Diet & physical activity - Third | 23 | 22.3 (1.2) | |
| Diet only - Fifth | 24 | 11.6 (0.5) | |
| Physical activity only - Fifth | 24 | 12.5 (0.9) | |
| Diet & physical activity - Fifth | 24 | 18.8 (0.4) | |
| Retention Interval by Grade | Same-day recall in the afternoon - Third | 35 | 15.4 (0.5) |
| Previous-day recall in the morning - Third | 36 | 15.7 (0.9) | |
| Same-day recall in the afternoon -Fifth | 36 | 15.2 (0.3) | |
| Previous-day recall in the morning -Fifth | 36 | 13.4 (0.1) | |
| Content by Retention Interval by Grade | Diet only - Same-day recall in the afternoon - Third | 12 | 10.5 (0.2) |
| Diet only - Same-day recall in the afternoon - Fifth | 12 | 13.2 (0.1) | |
| Diet only - Previous-day recall in the morning - Third | 12 | 13.3 (0.6) | |
| Diet only - Previous-day recall in the morning - Fifth | 12 | 9.9 (1.0) | |
| Physical activity only - Same-day recall in the afternoon - Third | 12 | 12.9 (0.8) | |
| Physical activityonly - Same-day recall in the afternoon - Fifth | 12 | 13.3 (0.9) | |
| Physical activity only - Previous-day recall in the morning - Third | 12 | 11.9 (0.5) | |
| Physical activity only - Previous-day recall in the morning - Fifth | 12 | 11.7 (1.3) | |
| Diet & physical activity - Same-day recall in the afternoon - Third | 11 | 22.8 (0.8) | |
| Diet & physical activity - Same-day recall in the afternoon - Fifth | 12 | 19.2 (0.8) | |
| Diet & physical activity - Previous-day recall in the morning - Third | 12 | 21.9 (1.6) | |
| Diet & physical activity - Previous-day recall in the morning - Fifth | 12 | 18.4 (0.2) |
a
The final sample consisted of 143 children because one third-grade girl’s interview with diet-&-physical-activity content and same-day recall in the afternoon retention interval had to be dropped during analyses when it was discovered that the accelerometer had recorded less than one hour of data.