Table 1.
Test-retest reliability assessment of the items included on the dietary screener, and validity assessment of the dietary screener compared to the “gold standard” of 3 days of 24-hour dietary recalls.
| Item | Reliability testing | Validity testing | ||||
|---|---|---|---|---|---|---|
| Spearman correlation | Simple kappa | P-value | Simple kappa (comparing tertiles of intake) | P-value | Reported consumption in recalls, n | |
| Beverage frequency | ||||||
| Regular soda | 0.82 (n=33) | -- | <0.001 | 0.38 (n=59) | <0.001 | 27 |
| Diet soda | 0.63 (n=33) | -- | <0.001 | -- | -- | 5 |
| Sports drinks | 0.75 (n=33) | -- | <0.001 | 0.25 (n=59) | 0.001 | 11 |
| Other sweetened beverages | 0.66 (n=33) | -- | <0.001 | 0.11 (n=59) | 0.11 | 27 |
| Milk | 0.84 (n=32) | -- | <0.001 | 0.27 (n=59) | 0.002 | 51 |
| Coffee drinks | 0.79 (n=33) | -- | <0.001 | -- | -- | 0 |
| Beverage amount | ||||||
| Regular soda | -- | 0.59 (n=31) | <0.001 | 0.19 (n=59) | <0.001 | 27 |
| Diet soda | -- | 0.73 (n=17) | <0.001 | -- | -- | 5 |
| Water | -- | 0.68 (n=33) | <0.001 | 0.20 (n=59) | <0.001 | 51 |
| Fast food | ||||||
| Overall frequency | 0.67 (n=33) | -- | <0.001 | 0.03 (n=59) | 0.38 | 35 |
| Fast food type | ||||||
| Traditional “burger-and- fries,” | -- | 0.60 (n=33) | <0.001 | -- | -- | 5 |
| Mexican | -- | 0.76 (n=33) | <0.001 | -- | -- | 6 |
| Fried chicken | -- | 0.80 (n=33) | <0.001 | -- | -- | 0 |
| Sandwich/subs | -- | 0.51 (n=33) | 0.003 | -- | -- | 6 |
| Pizza | -- | 0.34 (n=33) | 0.05 | -- | -- | 8 |
| Asian | -- | 0.20 (n=33) | 0.20 | -- | -- | 7 |
| Bakery/donut shop | -- | 0.10 (n=33) | 0.56 | -- | -- | 2 |
| Bagel shop | -- | 0.78 (n=33) | <0.001 | -- | -- | 1 |
| Coffee shop | -- | 0.51 (n=33) | 0.002 | -- | -- | 3 |
| Ice cream and burgers | -- | 0.63 (n=33) | <0.001 | -- | -- | 8 |
| Snack bar | -- | 0.39 (n=33) | 0.03 | -- | -- | 2 |