Table 6.

Agreement of parameters measured using the scansys and pentacam.

Group	Parameters	Mean ± SD		P-valuea	r	95% LoA
		Scansys	Pentacam
NL	CCT	547.73 ± 29.94	552.20 ± 29.19	< 0.001a	0.915b	− 19.43 to 28.36
	TCT	542.39 ± 29.01	549.29 ± 29.17	< 0.001a	0.920b	− 15.91 to 29.70
	Kmax	44.29 ± 1.56	44.19 ± 1.55	0.125	0.915b	− 1.35 to 1.16
	PTE	4.85 ± 4.34	4.67 ± 2.49	0.595	0.615b	− 6.89 to 6.53
KCS	CCT	527.38 ± 30.41	533.44 ± 31.95	< 0.001a	0.971b	− 8.99 to 21.10
	TCT	520.31 ± 30.92	527.82 ± 32.09	< 0.001a	0.972b	− 7.28 to 22.29
	Kmax	45.82 ± 2.08	45.61 ± 2.16	0.007a	0.958b	− 1.413 to 1.01
	PTE	12.155 ± 5.98	12.37 ± 4.24	0.658	0.742b	− 7.65 to 8.07
KC	CCT	464.61 ± 47.86	462.55 ± 44.09	0.335	0.949b	− 31.67 to 27.56
	TCT	450.94 ± 47.178	455.04 ± 42.59	0.042a	0.956b	− 23.42 to 31.62
	Kmax	58.81 ± 11.75	58.86 ± 10.32	0.908	0.983b	− 4.83 to 4.91
	PTE	62.30 ± 36.98	51.63 ± 24.56	< 0.001a	0.874b	− 48.99 to 27.65

Data are shown as mean ± SD.

NL normal controls, KCS keratoconus suspects, KC keratoconus, CCT central corneal thickness, TCT thinnest corneal thickness, Kmax maximum keratometry, PTE posterior elevation at the thinnest point, LoA limits of agreement, SD standard deviation.

The ^aP-values are for the comparison of the Scansys and Pentacam parameters (paired t-test, ^aP < 0.05 indicates a statistically significant difference); r, Pearson’s correlation coefficient; ^bP < 0.05 indicates a statistically significant correlation.