Table 6.

Incidence rate of rejection episode.

	Surgical procedure of keratoplasty
	[A] PK	[B] DSAEK	[C] nDSAEK	[D] DMEK
Overall summary statistics
Number of patients	198	277	138	117
Person-years [100 person-years]	9.57	8.54	7.09	4.15
Rejection episodes	33	20	11	1
Incidence rate [/100 person-years]	3.45	2.34	1.55	0.24
Incidence rate of rejection episodes by time period after keratoplasty (number of episodes/100 person-years)
[1] 0–< 1 year after keratoplasty	7.55 (14/1.85)	4.22 (11/2.61)	4.56 (6/1.31)	0.00 (0/1.16)
[2] 1–< 2 years after keratoplasty	6.44 (10/1.55)	0.96 (2/2.09)	1.83 (2/1.09)	0.92 (1/1.08)
[3] 2–< 3 years after keratoplasty	0.78 (1/1.27)	2.83 (4/1.42)	2.21 (2/0.91)	0.00 (0/0.80)
[4] 3–< 4 years after keratoplasty	2.93 (3/1.03)	3.27 (3/0.92)	0.00 (0/0.77)	0.00 (0/0.46)
[5] 4–< 5 years after keratoplasty	1.26 (1/0.79)	0.00 (0/0.54)	0.00 (0/0.70)	0.00 (0/0.26)
[6] 5 + years after keratoplasty	1.30 (4/3.07)	0.00 (0/0.97)	0.44 (1/2.30)	0.00 (0/0.39)

DMEK descemet membrane endothelial keratoplasty, (n)DSAEK (Non-)Descemet’s stripping automated endothelial keratoplasty, PK penetrating keratoplasty.