Table 3.
Comparison of scores between individuals with and without previous nutrition education; test-retest reliability; internal reliability analysis; results of Rasch analysis
| Section | Score (%): Nutrition education | Score (%): No nutrition education | Score p-level | Pearson’s Correlation R (p- level) | KR-20+ | Dimensionality (Per < 5%) | Bonferroni adjusted p-level | Item fit statistics |
|---|---|---|---|---|---|---|---|---|
| *Overall (n = 89) | 64. 65 (16) | 52 (19) | <0.001 | 0.92 (<0.001) | 0.0.87 | 19.3% | 0.0005 | Persons SD = 1.0271, Mean = −0.0938 |
| Items SD = 1.324, Mean = 0.0724 | ||||||||
| Chi-Square probability = 0.000 | ||||||||
| **WeightManagement (n = 13) | 77 (23) | 62 (31) | <0.001 | 0.0.81 (<0.001) | 0.62 | 2.8% | 0.004 | Persons SD = 0.62, Mean = −0.12; |
| Items SD = 1.06; Mean = 0.02; | ||||||||
| Chi Square probability = 0.01 > 0.004 | ||||||||
| *Macronutrients (n = 30) | 78 (15) | 61 (16) | <0.001 | 0.0.81 (<0.001) | 0.78 | 5.0% | 0.002 | Persons SD = 0.72, Mean = −0.11; |
| Items SD = 1.35; Mean = 0.05; | ||||||||
| Chi Square probability = 0.0000 < 0.002 | ||||||||
| **Micronutrients (n = 13) | 69 (23) | 50.0 (30.8) | <0.001 | 0.76 (<0.001) | 0.71 | 0.0% | 0.005 | Persons SD = 0.80, Mean = −0.21; |
| 50 (31) | ||||||||
| Items SD = 1.16; Mean = −0.36; | ||||||||
| Chi Square probability = 0.0002 < 0.0004 | ||||||||
| **Sports Nutrition (n = 13) | 54 (23) | 46 (23) | <0.001 | 0.0.73 (<0.001) | 0.63 | 1.7% | 0.004 | Persons SD = 0.57, Mean = −0.19; |
| Items SD = 1.39; Mean = 0.06; | ||||||||
| Chi Square probability = 0.009 > 0.004 | ||||||||
| **Supplements (n = 12) | 33 (33) | 25 (25) | <0.001 | (0.60.35 (0.6) | 0.0.69 | 0.0% | 0.004 | Persons SD = 0.69, Mean = −0.13; |
| Items SD = 0.82; Mean = −0.20; | ||||||||
| Chi Square probability = 0.02 > 0.004 | ||||||||
| **Alcohol (n = 8) | 63 (31) | 63 (25) | 0.0.80 | 0.66 (<0.001) | 0.0.51 | 0.0% | 0.007 | Persons SD = 0.65, Mean = −0.14; |
| Items SD = 1.1; Mean = −0.09; | ||||||||
| Chi Square probability = 0.003 < 0.007 |
*Normally distributed; scores reported as Mean (SD) **Non-normally distributed; scores reported as Median (IQR). CTT: Significant differences in groups scores indicate construct validity; Pearson’s r of 0.7 indicates adequate test-retest reliability; a KR-20 of 0.7 indicates adequate internal reliability. Rasch analysis: A non-significant Bonferroni adjusted chi-square probability indicates items are equally difficult across all participants (i.e. are good discriminators); a SD of 1 and Mean of 0 (for persons/items) indicate perfect fit to the Rasch model; a SD of >1.5 indicates the assumptions that difficult items are less likely to be answered correctly or well-scoring participants are more likely to answer questions correctly has not been met