Table 4

Regression models for body fat percentage

 Model Explained variance Model significance Unstandardised beta coefficient (95% CI), p value Likelihood-ratio test (compared with covariate) Covariate Model R2=0.7670 F(13,1582)=400.63p<0.0001 OA type 2: (0.1 (−0.9 to 1.0))3: (0.2 (−1.0 to 1.5))4: (0.0 (−1.0 to 1.0))5: (−0.2 (−1.2 to 0.9))6: (0.5 (−0.8 to 1.8))7: (0.3 (−0.7 to 1.2)) Age (0.1 (0.1 to 0.1))Sex (11.3 (10.9 to 11.7))BMI (0.8 (0.8 to 0.9))CES-D-10 (0.0 (0.0 to 0.1))EDU (−0.1 (−0.2 to 0.0))INC (−0.2 (−0.4 to 0.0))SEQ (0.0 (−0.1 to 0.1)) Covariates+NUTHC R2=0.7671 F(14,1581)=371.90p<0.0001 NUTHC (0.1 (−0.2 to 0.4)), p=0.53 p=0.53 Covariates+NUTFBR R2=0.7676 F(14,1581)=373.00p<0.0001 NUT FBR (−0.3 (−0.6 to 0.0)), p=0.046 p=0.045 Covariates+NURSCR R2=0.7691 F(14,1581)=376.10p<0.0001 NUR SCR (−0.1 (−0.1 to 0.0)), p<0.001 p=0.0002 Covariates+NURCLS R2=0.7688 F(15,1580)=350.31p<0.0001 NUR CLS p=0.002 2: (0.6 (0.1 to 1.0)), p=0.01 3: (0.8 (0.3 to 1.3)), p=0.001 Covariates+PASE R2=0.7696 F(14,1581)=377.20p<0.0001 PA (−0.01 (0.0 to 0.0), p<0.001) p<0.0001
• Independent variables: frequency of high calorie snacks (NUTHC), frequency of high fibre cereal (NUTFBR), nutrition risk score (NURSCR), nutrition risk classification (NURCLS 2=moderate risk, NURCLS 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.