Table 3.

Mean difference, standard deviation, level of statistical significance, and limits of agreement between each set of measurement techniques to be compared at the 95% confidence interval

	Mean	SD	P	Limits of agreement
				Mean difference −1.96*SD	Mean difference +1.96*SD
CCT (μm)
Sirius versus SP100	4.68	10.47	0.003	−15.84	25.20
ACD (mm)
Sirius versus US800	−0.40	0.16	<0.001	−0.72	−0.07
Sirius + CCT* versus US800	0.15	0.16	<0.001	−0.16	0.45
Sirius versus US800 – CCT**	0.15	0.16	<0.001	−0.16	0.45

Notes:

^*Sirius + CCT represents the sum of ACD and CCT obtained with Sirius;

^**US800 – CCT represents the value of ACD obtained with US800 ultrasound biometry minus the CCT obtained with ultrasound pachymetry.

Abbreviations: ACD, anterior chamber depth; CCT, central corneal thickness; SD, standard deviation.