Table 3.

Comparison between converters and non-converters.

Characteristic	Non-Converters n = 35	Converters n = 15	P
Age (years), mean ± SD	57.9 ± 13.9	62.2 ± 12.9	0.27
Female, n (%)	22 (63%)	9 (60%)	1.0
History of BCG vaccination, n (%)	10 (28.6%)	5 (33.3%)	0.74
Foreign nationality	2 (5.7%)	3 (20%)	0.15
Possible exposure	1 (2.9%)	1 (6.7%)	0.51
Diagnosis
RA	19 (54%)	5 (33%)
Non-RA	16 (46%)	10 (67%)	0.22
AS	10 (28.6%)	4 (26.7%)
PsA	5 (14.3%)	4 (26.7%)
Other	1 (2.9%)	2 (13.3%)
Disease duration (years), mean ± SD	14.3 ± 7.8	16.7 ± 13.6	0.44

The comparison between those who did (n = 15) or did not (n = 35) convert during follow-up is shown.

BCG: Bacillus Calmette–Guérin; RA: rheumatoid arthritis; AS: ankylosing spondylitis; PsA: psoriatic arthritis.