Table 4 Cross-classification of intakes by quartiles and weighted kappa coefficient in the 2nd trimester
From: Validation of a self-administered web-based 24-hour dietary recall among pregnant women
| Â | % | Weighed Kappa | |||
|---|---|---|---|---|---|
Same quartile | Adjacent quartiles | ± 1 Quartile apart | Misclassification (quartile 1 vs 4) | ||
Energy | 43.3 | 38.3 | 81.6 | 1.7 | 0.39 |
Carbohydrates | 53.3 | 33.3 | 86.6 | 3.3 | 0.49 |
Fat | 40.0 | 41.7 | 81.7 | 1.7 | 0.36 |
Proteins | 40.0 | 38.3 | 78.3 | 5.0 | 0.31 |
% Carbohydrates | 41.7 | 38.3 | 80.0 | 5.0 | 0.33 |
% Fat | 33.3 | 45.0 | 78.3 | 1.7 | 0.28 |
% Proteins | 51.7 | 35.0 | 86.7 | 1.7 | 0.49 |
Saturated fatty acids | 38.3 | 43.3 | 81.6 | 6.7 | 0.31 |
Cholesterol | 21.7 | 46.7 | 68.4 | 3.3 | 0.09 |
Vitamin A | 30.0 | 41.7 | 71.7 | 1.7 | 0.20 |
Thiamin | 48.3 | 38.3 | 86.7 | 1.7 | 0.47 |
Riboflavin | 33.3 | 51.7 | 85.0 | 1.7 | 0.33 |
Niacin | 26.7 | 41.7 | 68.4 | 1.7 | 0.15 |
Vitamin B6 | 38.3 | 35.0 | 73.3 | 8.3 | 0.23 |
Folic Acid | 40.0 | 33.3 | 73.3 | 3.3 | 0.28 |
Vitamin B12 | 30.0 | 38.3 | 68.3 | 8.3 | 0.12 |
Vitamin C | 40.0 | 50.0 | 90.0 | 0 | 0.44 |
Vitamin D | 33.3 | 38.3 | 71.6 | 8.3 | 0.17 |
Magnesium | 50.0 | 38.3 | 88.3 | 5.0 | 0.47 |
Phosphorus | 40.0 | 38.3 | 78.3 | 1.7 | 0.33 |
Zinc | 31.7 | 40.0 | 71.7 | 10.0 | 0.15 |
Iron | 43.3 | 36.7 | 80.0 | 3.3 | 0.36 |
Calcium | 40.0 | 48.3 | 88.3 | 1.7 | 0.41 |
Potassium | 41.7 | 33.3 | 75.0 | 3.3 | 0.31 |
Sodium | 48.3 | 31.7 | 80.0 | 8.3 | 0.36 |
Dietary fibres | 46.7 | 36.7 | 83.4 | 3.3 | 0.41 |
Average | 39.4 | 39.7 | 79.1 | 3.9 | 0.32 |