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Table 2 Frequency distribution of IL17RA copy numbers in cases and controls and estimation of AS risk. (N (%))

From: Copy number variation of IL17RA gene and its association with the ankylosing spondylitis risk in Iranian patients: a case-control study

Copy Number of IL17RA AS (N = 455) HCs (N = 450) OR (95% CI) P value
=2 Copies 347 (76.3%) 385 (85.6%) Ref. Ref.
<  2 Copies 61 (13.4%) 31 (6.9%) 2.18 (1.38–3.44) < 0.001a*
>  2 Copies 47 (10.3%) 34 (7.6%) 1.53 (0.963–2.44) 0.071 a
  1. AS ankylosing spondylitis, HCs healthy controls.
  2. aCompared with = 2 copies
  3. OR Odds ratios, 95% CI 95% confidence interval.
  4. *P value < 0.05 has statistical significance