Table 4.
Difference between the selected photograph number and the most closely matching image number, and agreement in selection of portion size images, among a random sample of ninety-five adults in forty-eight rural households with a pregnant woman in southern Nepal, March–June 2014
| % of respondents with selection error of n images | Observed | Agreement expected by | Cohen’s weighted kappa | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Food type | n * | 0 | ±1 | ±2 | ±3 or more | agreement (%) | chance (%) | κ w | se | P value |
| Rice (six photographs) | 71 | 33·8 | 50·7 | 11·3 | 4·2 | 94·7 | 91·2 | 0·391 | 0·105 | <0·001 |
| Vegetable curry (four photographs) | 49 | 46·9 | 40·8 | 10·2 | 2·0 | 89·0 | 80·7 | 0·430 | 0·139 | 0·001 |
| Dal (spiced lentil soup; three photographs) | 34 | 47·1 | 41·2 | 11·8 | Not possible | 77·9 | 76·9 | 0·045 | 0·063 | 0·238 |
*
Recalls were excluded if respondents used multiplication or division factors (e.g. if someone reported having two servings of a portion image) or if respondents recorded recalls that were in between two portion size images.