Table 4 Association between concurrent presence of metabolic factors and osteoarthritis of the hand.

	Hand OA
	Mean BMI	Prevalence of hand OA, %	OR (95% CI)*
BMI ⩽27.4 kg/m2 (reference group)	24.4	24.6
BMI >27.4 kg/m2	30.2	33.2	1.4 (1.2 to 1.7)
BMI ⩽27.4 kg/m2, no diabetes (reference group)	24.3	24.4
BMI >27.4 kg/m2+diabetes	30.8	38.2	1.6 (1.0 to 2.4)
BMI ⩽27.4 kg/m2, no hypertension (reference group)	24.2	23.2
BMI >27.4 kg/m2+hypertension	30.5	35.7	1.5 (1.2 to 2.0)
BMI ⩽27.4 kg/m2, no hypertension, no diabetes (reference group)	24.2	22.7
BMI >27.4 kg/m2+diabetes+hypertension	31.2	45	2.3 (1.3 to 3.9)

BMI, body mass index; OA, osteoarthritis.

*Adjusted for age, gender and smoking.

Absolute prevalence of hand OA in our study population: 27.5%.