Table 2.

Association of dietary quality (DQI-I) with hand grip strength (kg) as a continuous variable^*

Nutrition Index	Model 1			Model 2
	β	95 % CI	P	β	95 % CI	P
DQI-I, per sd	1·00	0·60, 1·40	< 0·001	0·51	0·26, 0·76	< 0·001
DQI-I quartiles
Q1	Ref			Ref
Q2	1·20	0·05, 2·35	0·041	0·11	–0·61, 0·83	0·76
Q3	2·78	1·65, 3·91	< 0·001	0·92	0·21, 1·62	0·011
Q4	2·20	1·07, 3·32	< 0·001	1·11	0·41, 1·82	0·002
P for trend	< 0·001			< 0·001

DQI-I, Dietary Quality Index – International; MVPA, moderate-to-vigorous physical activity; MET, metabolic equivalents of task.

^*Model 1: unadjusted model. Model 2: adjusted for age (years), sex, ethnicity, total MVPA (MET-h/d) and smoking status.