Malapposition of graft-host interface after penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty (DALK): an optical coherence tomography study

Table 3 Comparisons of frequency of appositions (F) between Post-PK and Post-DALK groups

Types of apposition	F (%) in Post-PK	F (%) in Post-DALK	P
Types of apposition	Mean (SD), number	Mean (SD), number	P
Regular-apposition	45.45(30.50), 80	38.04(31.19), 70	0.425
Step	26.14(21.10), 47	59.28(31.81), 111	<.0001
Graft step	11.36(14.39), 20	54.39(34.26), 102	<.0001
Host step	15.34(21.80),27	3.80(9.56), 9	0.018
Protrusion	23.30(21.58), 41	0.54(2.61),1	<.0001
Hill	17.05(18.32), 33	0(0),0	<.0001
Tag	4.55(7.26), 8	0.54(2.61), 1	0.017
Gape	4.55(7.26), 8	1.09(3.60), 2	0.052

Post-PK Post penetrating keratoplasy, post-DALK Post-deep anterior lamellar keratoplasty, Fc Frequency of apposition

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