Table 3.
Distribution of Number of Intrusions per Interview by School Meal and Interview Sequence a
| School breakfast | School lunch | |||||||
|---|---|---|---|---|---|---|---|---|
| Interview sequence (and number of interviews for which meals reported met criteria to be considered the school meal) | Interview sequence (and number of interviews for which meals reported met criteria to be considered the school meal) | |||||||
| 1st (n=91) | 2nd (n=83) | 3rd (n=74) | Total (n=248) | 1st (n=102) | 2nd (n=89) | 3rd (n=77) | Total (n=268) | |
| Intrusions per interview | Number of interviews (% of interviews) | |||||||
| 0 | 16 (18%) | 16 (19%) | 21 (28%) | 53 (21%) | 30 (29%) | 31 (35%) | 34 (44%) | 95 (35%) |
| 1 | 26 (29%) | 29 (35%) | 24 (33%) | 79 (32%) | 36 (35%) | 27 (30%) | 24 (31%) | 87 (33%) |
| 2 | 24 (26%) | 16 (19%) | 12 (16%) | 52 (21%) | 20 (20%) | 11 (12%) | 7 (9%) | 38 (14%) |
| 3 | 15 (16%) | 17 (21%) | 14 (19%) | 46 (19%) | 11 (11%) | 10 (11%) | 9 (12%) | 30 (11%) |
| 4 | 10 (11%) | 5 (6%) | 2 (3%) | 17 (7%) | 3 (3%) | 7 (8%) | 2 (3%) | 12 (5%) |
| 5 | 0 (0%) | 0 (0%) | 1 (1%) | 1 (<1%) | 2 (2%) | 3 (4%) | 1 (1%) | 6 (2%) |
| Interviews with intrusions | 75 (82%) | 67 (81%) | 53 (72%) | 195 (79%) | 72 (71%) | 58 (65%) | 43 (56%) | 173 (65%) |
See footnote a of Table 1 for information (about the sample of children, study design, and examples of items classified as intrusions) that is pertinent to Table 3. See footnote b of Table 1 for information (about criteria to be considered a school meal) that is pertinent to Table 3. The breakfast and lunch distributions over all interview sequences differed statistically when they included intrusion-free interviews (P=0.001, chi square), but just missed being statistically different when they excluded intrusion-free interviews (P=0.059, chi square). The proportion of intrusion-free interviews was greater for lunch (95/268=0.35) than breakfast (53/248=0.21) (P<0.001, two-sample test of proportion) but did not vary by interview sequence for breakfast (P>0.206, chi square) or lunch (P>0.122, chi square).