Long-Term Dietary Changes after Diagnosis of Rheumatoid Arthritis in Swedish Women: Data from a Population-Based Cohort

Table 1

Baseline characteristics of participants of the Swedish Mammography Cohort with or without RA diagnosis between 1997 and 2009.

Characteristics; (1997)	RA; (n=191)	No RA; (n=21,411)	p value^1
Age (yrs), mean ± SD	59 ± 7	59 ± 8	N.S.
BMI (Kg/m^2), mean ± SD	24.5 ± 3.6	25.0 ± 3.8	N.S.
Alcohol (g/day), mean ± SD	4.9 ± 5.2	4.8 ±5.2	N.S.
Smoking, %			<0.001
(i) Never	33.9	52.8
(ii) Former	31.7	25.5
(iii) Current	34.4	21.7
Education, %			N.S.
(i) Less than high school	33.0	34.8
(ii) High school	46.1	41.6
(iii) University	20.9	23.6

BMI: body mass index; N.S.: not significant; RA: rheumatoid arthritis; SD: standard deviation.
¹The significance level is 0.05.