Table 5.
Regression (clustered) analysis between Diet quality index and its components and subcomponents and type of lunch consumed on a school day for older adolescents aged 15–18 years from the NDNS rolling programme (Years 1–8).
| Adjusted* analysis | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cooked school meals as reference group | Cold school meal |
Packed lunch (from home) |
Buy lunch from shop/cafe |
Lunch at home |
Do not eat lunch |
|||||||||||||||
| B | 95% CI | P | B | 95% CI | P | B | 95% CI | P | B | 95% CI | P | B | 95% CI | P | ||||||
| DQI-A % | −0.8 | −4.5 | 2.9 | 0.7 | 5.5 | 2.7 | 8.4 | <0.01 | −5.0 | −8.1 | −2.0 | <0.01 | 3.9 | −1.6 | 9.3 | 0.2 | −0.9 | −8.6 | 6.8 | 0.8 |
| DQc % | −1.6 | −9.4 | 6.3 | 0.7 | 8.9 | 3.1 | 14.7 | <0.01 | −10.0 | −16.2 | −3.7 | <0.01 | 8.0 | −5.1 | 21.1 | 0.2 | 4.2 | −12.8 | 21.3 | 0.63 |
| DDc % | −0.6 | −3.5 | 2.4 | 0.7 | 4.2 | 1.8 | 6.5 | <0.01 | −3.2 | −5.7 | −0.6 | <0.01 | 3.0 | −0.8 | 6.7 | 0.1 | −6.4 | −12.0 | −0.8 | 0.02 |
| DEc % | −0.2 | −2.2 | 1.7 | 0.8 | 3.6 | 2.1 | 5.0 | <0.01 | −2.0 | −3.6 | −0.4 | <0.01 | 0.6 | −2.0 | 3.2 | 0.6 | −0.5 | −3.8 | 2.8 | 0.8 |
| DAx % | −0.7 | −2.9 | 1.5 | 0.5 | 3.3 | 1.6 | 5.1 | <0.01 | −2.8 | −4.7 | −0.8 | <0.01 | 0.6 | −2.5 | 3.6 | 0.7 | −5.7 | −9.4 | −2.1 | <0.01 |
| DEx % | −0.3 | −1.8 | 1.1 | 0.7 | −0.8 | −2.0 | 0.3 | 0.2 | −0.2 | −1.5 | 1.0 | 0.7 | −0.1 | −2.3 | 2.0 | 0.9 | −4.2 | −7.2 | −1.2 | 0.01 |
CI, Confidence Interval; DQI-A, Diet Quality Index for Adolescents; DQc, Diet quality component; DDc, Diet diversity component; DEc, Diet equilibrium component; DAx, Diet adequacy sub-component; DEx, Diet excess sub-component,
*Adjusted for gender, Region, energy under-reporting and equivalised household income.