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Table 1 Socio-demographic and ophthalmological characteristics

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

  total without CTR (non-CTR sub sample) with CTR (CTR sub sample) p-value
total number of study eyes 179 90 89  
… per center 3–37 1–19 2–18  
age [years] 71.0 (61.8; 76.3) 71.0 (60.8; 76.0) 70.0 (61.3; 77) 0.718
female patients % 47% 44% 50% 0.431
CDVA (decimal) 0.5 (0.32; 0.5) 0.5 (0.32; 0.5) 0.4 (0.3; 0.5) 0.608
Axial length [mm] 23.8 (23.2; 24.4) 23.7 (23.2; 24.3) 23.9 (23.3; 24.6) 0.168
Cylinder [dpt] AR −1.5 (−2.25; −1.0) −1.5 (− 2.25; − 1.0) −1.75 (− 2.63; − 1.0) 0.537
target cylinder. [dpt] Toric Calculator − 0.1 (− 0.22; 0.03) −0.08 (− 0.16; + 0.03) −0.14 − 0.25; 0.06) 0.555
SEQ [dpt] AR − 1.0 (− 3.13; + 0.88) − 1.06 (− 2.91; 1.0) 1.0 (−3.56; 0.56) 0.356
target refraction. [dpt] 0.0 (− 0.13; 0.06) 0.0 (− 0.13; 0.06) 0.0 (− 0.13; 0.06) 0.631
IOL-M. K1. [mm] 7.84 (7.68; 8.01 7.82 (7.67; 7.97) 7.86 (7.69; 8.06) 0.141
IOL-M. K2. [mm] 7.55 (7.41; 7.72) 7.54 (7.39; 7.66) 7.58 (7.41; 7.74) 0.334
CT. K1. [mm] 7.84 (7.67; 8.01) 7.83 (7.7; 7.98) 7.88 (7.67; 8.04) 0.201
CT. K2. [mm] 7.56 (7.43; 7;72) 7.56 (7.39; 7.72) 7.60 (7.44; 7.72) 0.427
  1. Pooled study sample (intent-to-treat population), stratified with and without capsular tension ring (CTR), medians and interquartile ranges, relative frequencies as well as nominal p-values derived from two-sample Wilcoxon tests and Chi2 tests (p-values not adjusted for multiplicity)
  2. SEQ: Spherical Equivalent, IOL-M: IOL Master (Carl Zeiss Meditec), CT: Corneal Topography, CDVA corrected distance visual acuity, CTR: Capsular Tension Ring, AR: Auto Refractometer, K: Keratometry, mm: millimeter