Table 5.

Mean and SD of Interfibrillar Spacing and Fibril Diameter in Corneal Stroma in All Subgroups

			Mean ± SD
Stroma	Group	n	Fibril Diameter (nm)	Interfibrillar Spacing (nm)	Fibrils per Unit Area, n	Fibrils Normalized by Stromal Thickness × 1000, n
Anterior	BC	6	31.7 ± 2.6	15.3 ± 1.4	579.0 ± 45.0	207.2 ± 20.9
	MWT	6	32.7 ± 3.2	17.3 ± 3.3	527.8 ± 120.7	173.2 ± 41.1
	MWC	6	32.0 ± 2.3	16.0 ± 2.8	564.9 ± 95.7	188.5 ± 30.9
	MT	6	33.4 ± 2.4	23.1 ± 2.0*,†	402.3 ± 51.6*,†	118.5 ± 14.6
	MC	6	32.1 ± 2.3	20.1 ± 2.0*	469.9 ± 41.0	154.7 ± 13.6
	P		0.303	<0.001	<0.001	<0.001
Intermediate	BC	6	31.7 ± 2.1	15.3 ± 1.1	580.5 ± 60.0	207.8 ± 25.8
	MWT	6	33.4 ± 3.5	17.7 ± 4.9	509.7 ± 126.3	167.1 ± 41.8
	MWC	6	32.6 ± 4.2	16.2 ± 3.9	557.4 ± 128.4	185.7 ± 40.8
	MT	6	33.4 ± 2.7	25.1 ± 2.3*,†	376.1 ± 46.8*,†	110.7 ± 13.0
	MC	6	33.4 ± 2.0	20.6 ± 1.9	440.9 ± 49.1	145.2 ± 16.4
	P		0.329	<0.001	<0.001	<0.001
Posterior	BC	6	32.3 ± 2.5	15.0 ± 1.7	576.8 ± 80.5	206.6 ± 33.0
	MWT	6	34.0 ± 4.2	17.4 ± 3.1	503.7 ± 133.1	165.8 ± 43.7
	MWC	6	32.8 ± 2.4	15.9 ± 2.9	548.6 ± 87.4	183.0 ± 27.6
	MT	6	33.5 ± 2.2	24.1 ± 1.5*,†	385.9 ± 28.0*,†	113.7 ± 83.8
	MC	6	33.3 ± 1.8	20.1 ± 1.6*	448.9 ± 42.1	147.8 ± 14.5
	P		0.330	<0.001	<0.001	<0.001

P indicates the significance of differences in fibril diameter in the different subgroups and different stromal layers.

^* P < 0.05 difference against BC subgroup.

^† P < 0.05 difference against MC subgroup.