Table 1

Baseline characteristics of the participants in the study population

Characteristics	Participants without EOA (n=3334)	Participants with EOA (n= 96)	Mean difference (95% CI)
Female, % (n)	55.7 (1858)	65.6 (63)	9.9 (−0.2 to 20)
Age (years), mean, SD	66.1 (7.0)	68.6 (6.5)	2.6 (1.2 to 4.1)^*
BMI (kg/m²), mean, SD	26.3 (3.6)	27.5 (3.5)	1.2 (0.5 to 1.9)^*
Hand pain, % (n)	15.5 (513)	39.6 (38)	24.1 (14.2 to 33.9)^*
HAQ^†≥ 0.5, % (n)	3.2 (105)	7.3 (7)	4.1 (−1.1 to 9.4)
Manual occupation, % (n)	28.5 (910)	22.6 (21)	−5.9 (−14.6 to 2.7)

↵* Statistically significant with p value < 0.05.
↵† HAQ (Stanford Health Assessment Questionnaire) based on eight questions concerning hand function.
BMI, body mass index; EOA, erosive osteoarthritis.