Table 2. Comparative analysis of electrocardiographic findings in patients with spondyloarthritis and controls.

ECG	SpA Group (n=100)	Control Group (n=50)	p value
Sinus rhythm, n (%)	100 (100)	50 (100)
Heart rate, bpm	47-96, median 68 (59-76)	51-101, median 73.5 (66.7-82.0)	0.006
Heart rate, seconds	0.61-1.28, mean 0.90±0.14	0.59-1.18, mean 0.83±0.12	0.009
First-degree atrioventricular block, n (%)	3 (3)	0	0.55
Ventricular repolarization changes, n (%)	54 (54)	20 (40)	0.10
Right bundle branch block, n (%)	37 (37)	6 (12)	0.014*
QT, seconds	0.32-0.49, median 0.40 (0.37-0.40)	0.32-0.48, median 0.36 (0.36-0.40)	<0.0001
QTc, seconds	0.36-0.49, median 0.41 (0.39-0.43)	0.34-0.49, median 0.40 (0.38-0.43)	0.08

* Odds ratio: 4.3; 95% confidence interval 1.67-11. ECG: electrocardiogram; QTc: corrected QT interval (Bazett formula).