Table 4.
Convergent validity of the PAIFIS in grams per day in a sub-sample of the SAYCARE Study.
| Children | FFQ1 | R24hrs | ||||||
| n | Median | (IQR) | Median | (IQR) | ρ | R * | PCV * | |
| Pro-inflammatory food group | ||||||||
| Sugar-sweetened beverages | 224 | 114.05 | (21.8; 267.5) | 360.0 | (133.3; 653.3) | 0.22 | - | - |
| Processed meat | 257 | 11.3 | (0.3; 25.7) | 10.1 | (0.13; 36.8) | 0.37 | - | - |
| Red meat | 257 | 25.2 | (7.1; 57.0) | 50,1 | (1.1; 86.7) | 0.31 | - | - |
| Candies | 257 | 85.5 | (25.9 200.1) | 83.8 | (34.3; 149.3) | 0.4 | - | - |
| Snacks | 257 | 16.1 | (2.2; 31.8) | 1.2 | (0.1; 53.4) | 0.28 | - | - |
| Anti-inflammatory food group | ||||||||
| Fruits | 232 | 172.2 | (58.6; 373,7) | 128.3 | (56.7; 250.0) | 0.22 | - | - |
| Vegetables | 228 | 26.9 | (10.8; 68.4) | 70.0 | (30.0; 148.7) | 0.23 | - | - |
| Sum groups | - | - | ||||||
| Pro-inflammatory | 257 | 369.8 | (149.2;663.4) | 559.0 | (327.8; 934.5) | 0.36 | - | - |
| Anti-inflammatory | 257 | 204.6 | (77.6; 446.6) | 215.1 | (125.2; 361.67) | 0.20 | - | - |
| PAIFIS | 257 | 72.4 | (−22.93; 374.9) | 350.4 | (55.9; 695.9) | 0.23 | 0.32 | 43.34 |
| Adolescents | FFQ1 | R24hrs | ||||||
| n | Median | (IR) | Median | (IR) | ρ | R * | PCV * | |
| Pro-inflammatory food group | ||||||||
| Sugar-sweetened beverages | 133 | 200.1 | (50.6; 42.6) | 520.0 | (200.0; 903.3) | 0.15 | - | - |
| Processed meat | 95 | 21.2 | (0,5; 46.9) | 51.18 | (41.51; 60.86) | 0.09 | - | - |
| Red meat | 108 | 42.1 | (10.5; 93.0) | 74.22 | (64.40; 84.05) | 0.24 | - | - |
| Candies | 136 | 181.8 | (47.7; 273.6) | 60.0 | (26.3; 111.7) | 0.18 | - | - |
| Snacks | 81 | 27.2 | (.9.2; 53.9) | 33.3 | (0; 66.7) | 0.25 | - | - |
| Anti-inflammatory food group | ||||||||
| Fruits | 110 | 180.6 | (76.8; 386.0) | 66.6 | (0; 160.0) | 0.16 | - | - |
| Vegetables | 121 | 35.9 | (10.8; 79.0) | 76.7 | (32.5; 133.3) | 0.17 | - | - |
| Sum groups | - | - | ||||||
| Pro-inflammatory | 146 | 540.5 | (274.2; 964.3) | 740.8 | (386.7; 1157.9) | 0.26 | - | - |
| Anti-inflammatory | 146 | 213.0 | (104.1; 466.7) | 163.3 | (80.0; 263.33) | 0.29 | - | - |
| PAIFIS | 146 | 247.8 | (1.7; 640.7) | 563.7 | (207.1; 992.7) | 0.16 | 0.24 | 15.45 |
Interquartile Range (IQR); food frequency questionnaire (FFQ); 24 h Food Recall (24HDR); Pro-inflammatory/Anti-inflammatory Food Intake Score (PAIFIS); PAIFIS = Σ AI − Σ PI. ρ, Spearman’s rho coefficient; PCV, proportional change attributable to region-level variance; R, regression coefficient; PAIFIS = Σ AI − Σ PI (g/day). * Coefficient from multilevel regression models after adjusting for center, type of school, sex, age, and total energy intake. Spearman’s efficiency coefficients in bold show moderate or strong values.