Table 2

Regression models for lean mass

 Model Explained variance Model significance Unstandardised beta coefficient (95% CI), p value Likelihood-ratio test (compared with covariate) Covariate Model R2=0.8314 F(13,1582)=600.06p<0.0001 OA type 2: (−0.3 (−1.6 to 0.9)) 3: (−1.3 (−2.8 to 0.3)) 4: (−0.8 (−2.1 to 0.5)) 5: (−0.8 (−2.1 to 0.6)) 6: (−2.1 (−3.7 to –0.4)) 7: (−1.5 (−2.7 to –0.2)) Age (−0.1 (−0.2 to –0.1))Sex (−18.0 (−18.5 to –17.4))BMI (1.0 (0.9 to 1.0))CES-D-10 (0.0 (−0.1 to 0.0))EDU (0.1 (−0.1 to 0.2))INC (0.8 (0.5 to 1.0))SEQ (0.1 (−0.1 to 0.2)) Covariates+NUTHC R2=0.8314 F(14,1581)=556.99p<0.0001 NUTHC (0.1 (−0.3 to 0.5)), p=0.56 p=0.56 Covariates+NUTFBR R2=0.8319 F(14,1581)=559.03p<0.0001 NUT FBR (0.5 (0.1 to 0.9)), p=0.02 p=0.02 Covariates+NURSCR R2=0.8319 F(14,1581)=558.76p<0.0001 NUR SCR (0.1 (0.0 to 0.1)), p=0.03 p=0.03 Covariates+NURCLS R2=0.8316 F(15,1580)=520.32p<0.0001 NURCLS p=0.31 2: (−0.3 (−0.8 to 0.3)), p=0.393: (−0.5 (−1.1 to 0.1)), p=0.13 Covariates+PASE R2=0.8330 F(14,1581)=563.33p<0.0001 PA (0.01 (0.01 to 0.02)), 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.