Histological Patterns of Epithelial Alterations in Keratoconus

Table 3

Descriptive statistics of the sample (stromal thickness).

		N	Mean	Standard deviation	Confidence interval 95%		Minimum	Maximum
					Inferior limit	Superior limit
Central stroma	1	15	368.27	163.881	277.51	459.02	187	870
	2	35	311.80	95.545	278.98	344.62	103	555
	3	40	291.98	102.050	259.34	324.61	102	568
	Total	90	312.40	113.971	288.53	336.27	102	870
Peripheral stroma	1	15	438.13	123.621	369.67	506.59	235	691
	2	35	444.63	115.502	404.95	484.30	206	640
	3	40	406.45	108.269	371.82	441.08	56	649
	Total	90	426.58	113.885	402.73	450.43	56	691