Table 4.

Comparing predictive powers of the two diet quality metrics^*

	Single score in the model				Both scores in the model
	HEI-2015		PDQS		HEI-2015		PDQS
	HR	95 % CI	HR	95 % CI	HR	95 % CI	HR	95 % CI	P-difference†
Model 1‡	0·85	0·79, 0·91	0·82	0·76, 0·89	0·91	0·84, 0·99	0·86	0·79, 0·94	0·44
Model 2§	0·91	0·84, 0·98	0·90	0·83, 0·97	0·94	0·86, 1·02	0·93	0·85, 1·01	0·88

HEI-2015, Healthy Eating Index-2015; PDQS, Prime Diet Quality Score.

^*Standardised to probit scores (1-sd).

^† P-value based on the Wald test evaluating the hypothesis that the β coefficient for the HEI-2015 equals the β coefficient for the PDQS.

^‡Adjusted for age (continuous), sex and race/ethnicity.

^§Fully adjusted for age (continuous), sex, race/ethnicity, day of week (weekend v. weekday), smoking status (nonsmoker, past and current) alcohol use (nondrinker, 2–4 drinks/week, 5–10 drinks/week, 11–18 drinks/week or 19+ drinks/week), physical activity (low, medium, high), BMI (<25, 25–29.9, 30–34.9, 35 and above).