Journal of Ophthalmology / 2014 / Article / Tab 3

Clinical Study

Evaluation of Pachymetric Measurements with Scheimpflug Photography-Based System and Optical Coherence Tomography Pachymetry at Different Stages of Keratoconus

Table 3

Degree of correlation between measurements of two devices at different stages of the keratoconus.

Measurement localizationsStage 1Stage 2Stage 3Stage 4Total
ICC ( )%95 CIICC ( )%95 CIICC ( )%95 CIICC ( )%95 CIICC ( )%95 CI

TCT0,953**0,930–0,9680,914**0,855–0,9490,921**0,547–0,9890,751**0,363–0,9170,946**0,927–0,960
CCT0,944**0,916–0,9620,876**0,794–0,9260,915**0,518–0,9880,881**0,656–0,9620,942**0,922–0,957
CT 3 mm0,939**0,910–0,9590,910**0,849–0,9470,866**0,866–0,9970,791**0,446–0,9310,936**0,914–0,953
CT 5 mm0,910**0,868–0,9390,935**0,890–0,9620,977**0,849–0,9970,900**0,706–0,9680,915**0,887–0,937
CT 8 mm0,903**0,858–0,9350,866**0,778–0,9200,831**0,204–0,9740,731**0,325–0,9090,903**0,871–0,928

ICC: intraclass correlation coefficient, CI: confidence interval, CCT: central corneal thickness, TCT: thinnest corneal thickness, CT 3 mm: corneal thickness at 3 mm, CT 5 mm: corneal thickness at 5 mm, and CT 8 mm: corneal thickness at 8 mm.