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Table 3 Relative frequencies and 95%-confidence interval (95%-CI) relating to the primary and two secondary endpoints, medians and interquartil ranges for the underlying continuous outcome parameter

From: Rotation of a toric intraocular lens with and without capsular tension ring: data from a multicenter non-inferiority randomized clinical trial (RCT)

  without CTR (non-CTR sub sample) with CTR (CTR sub sample) total (pooled)
Primary endpoint: rotation
n= 72 67 139
 postoperative absolute rotation <= 5 degrees incidence 89% 91% 90%
95%-CI 81–96% 84–98% 85–95%
 postoperative absolute rotation median 1.787° 1.722° 1.737°
Interquartile range 0.769°; 3.18° 0.829°; 3.589° 0.801°; 3.372°
Secondary endpoint: cylinder
n= 84 85 169
 absolute postoperative deviation of achieved cylinder from target cylinder ≤ ±0,5 dpt incidence 45% 46% 46%
95%-CI 34–56% 35–57% 38–54%
 absolute postoperative deviation of achieved cylinder from target cylinder median [dpt] 0.52 0.55 0.55
Interquartile range [dpt] 0.38; 1.01 0.28; 0.93 0.34; 0.98
Secondary endpoint: BVCA
n= 84 88 172
 CDVA > = 0.8 incidence 92% 88% 90%
95%-CI 86–98% 80–95% 85–94%
 postoperative CDVA median 1.0 1.0 1.0
Interquartile range 0.8; 1.0 0.875; 1.0 0.8; 1.0
  1. Pooled study sample (Intent-to-treat population), stratified with and without capsular tension ring (CRT)
  2. CDVA: Corrected distance visual acuity
  3. CTR: Capsular tension ring
  4. CI: Confidence Interval
  5. dpt: Dioptre