Comparison of Two Different OCT Systems: Retina Layer Segmentation and Impact on Structure-Function Analysis in Glaucoma

Table 4

Structure-function relationship expressed as regression coefficients and corresponding values.

Independent variable	Dependent variable	Regressive slope	Std. error	value
Cirrus MT	MD	−7.459	1.552	<0.001
Spectralis MT	MD	−9.590	1.656	<0.001
Spectralis cMT	MD	−9.559	1.671	<0.001
Cirrus GCIPL	MD	−4.623	0.445	<0.001
Cirrus mGCIPL	MD	−3.206	0.374	<0.001
Spectralis GCIPL	MD	−3.053	0.336	<0.001
Spectralis cGCIPL	MD	−3.548	0.315	<0.001

OCT values were transformed to logarithmic scale. MT: full macular thickness, GCIPL: ganglion cell-inner plexiform layer, cMT and cGCIPL: average values after manual correction of layer segmentation in Spectralis OCT, mGCIPL: minimum GCIPL value calculated by Cirrus software, MD: mean defect.