Skip to main content

Table 2 Difference in counting data of parameters of Sirius between True Negative Group and False Positive Group

From: The possible causes for tomography suspect Keratoconus in a Chinese cohort

   TNG FPG P*
N (%) N (%)
SIf normal 160 (100.0) 107 (58.5) < 0.001
suspect 0 (0.0) 52 (28.4)  
KC 0 (0.0) 24 (13.1)  
SIb normal 158 (98.8) 110 (60.1) < 0.001
suspect 2 (1.3) 65 (35.5)  
KC 0 (0.0) 8 (4.4)  
BCVf normal 160 (100.0) 176 (96.2) 0.016
suspect 0 (0.0) 7 (3.8)  
KC 0 (0.0) 0 (0.0)  
BCVb normal 159 (99.4) 163 (89.1) < 0.001
suspect 1 (0.6) 16 (8.7)  
KC 0 (0.0) 4 (2.2)  
KVf normal 160 (100.0) 183 (100.0)
abnormal 0 (0.0) 0 (0.0)  
KVb normal 144 (90.0) 117 (63.9) < 0.001
abnormal 16 (10.0) 66 (36.1)  
ThkMin < 471 0 (0.0) 2 (1.1) 0.005
471–482 0 (0.0) 8 (4.4)  
> 482 160 (100.0) 173 (94.5)  
Class Normal 160 (100.0) 75 (41.0) < 0.001
SK 0 (0.0) 108 (59.0)  
  1. TNG True Negative Group, FPG False Positive Group, KC keratoconus, SIf symmetry index of front corneal curvature (< 0.85 normal, 0.85–1.25 suspect, > 1.25 KC); SIb, symmetry index of back corneal curvature (< 0.22 normal, 0.22–0.37 suspect, > 0.37 KC); BCVf, Baiocchi Calossi Versaci front (< 0.80 normal, 0.80–1.20 suspect, > 1.20 KC); BCVb, Baiocchi Calossi Versaci back (< 0.80 normal, 0.80–1.20 suspect, > 1.20 KC); KVf, keratoconus vertex front (<15um normal, > = 15um abnormal); KVb, keratoconus vertex back (<15um normal, > = 15um abnormal); ThkMin, minimum thickness
  2. * Pearson Chi square test was used, fisher exact test was used if number of one grid less than 1
\