Table 5.

Regression models for total mass

Model	Explained variance	Model significance	Unstandardised beta coefficient (95% CI), p value	Likelihood-ratio test (compared with covariate)
Covariate Model	R2=0.8754	F(13,1582)=854.78 p<0.0001	OA type
			2: (−0.3 (1.9 to 1.2)) 3: (−1.3 (−3.3 to 0.6)) 4: (−1.4 (−3.0 to 0.3)) 5: (−1.2 (−2.9 to 0.5)) 6: (−2.7 (−4.8 to –0.6)) 7: (−1.8 (−3.4 to –0.2))
			Age (−0.1 (−0.1 to –0.1)) Sex (−13.1 (−13.8 to –12.4)) BMI (2.7 (2.6 to 2.7)) CES-D-10 (0.0 (−0.1 to 0.0)) EDU (0.0 (−0.2 to 0.2)) INC (0.9 (0.5 to 1.2)) SEQ (0.0 (−0.2 to 0.2))
Covariates+NUTHC	R2=0.8756	F(14,1581)=794.71 p<0.0001	NUTHC (0.4 (−0.1 to 0.9)), p=0.11	p=0.11
Covariates+NUTFBR	R2=0.8756	F(14,1581)=794.88 p<0.0001	NUTFBR (0.4 (−0.1 to 1.0)), p=0.09	p=0.09
Covariates+NURSCR	R 2 =0.8754	F(14,1581)=793.22 p<0.0001	NURSCR (0.0 (−0.1 to 0.1)), p=0.94	p=0.94
Covariates+NURCLS	R2=0.8754	F(15,1580)=740.32 p<0.0001	NURCLS	p=0.65
			2: (0.3 (−0.4 to 1.1)), p=0.36 3: (0.1 (−0.7 to 0.9)), p=0.75
Covariates+PASE	R2=0.8755	F(14,1581)=794.26 p<0.0001	PA (0.0 (0.0 to 0.0)), p=0.18	p=0.18

Independent variables: frequency of high calorie snacks (NUT_HC), frequency of high fibre cereal (NUT_FBR), nutrition risk score (NUR_SCR), nutrition risk classification (NUR_CLS ²=moderate risk, NUR_CLS ³=high risk) and PASE (Physical Activity Scale for the Elderly). Covariates: OA type (1=hand, hip, knee; 2=knee; 3=hip and knee; 4=hip; 5=hand and knee; 6=hand and hip; 7=hand), age, sex, body mass index (BMI), depressive symptoms (CES-D-10), education level (EDU), income (INC), social inequality (SEQ).

Bolded variables indicate those that were statistically significant (p<0.05).

CES-D-10, 10-item Center for Epidemiological Studies Short Depression Scale; OA, osteoarthritis; PA, physical activity.