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. 2021 May 11;259(9):2761–2770. doi: 10.1007/s00417-021-05204-1

Fig. 3.

Fig. 3

Kaplan–Meier plots comparing success rates of groups PS (primary surgery), N (needling), and BR (bleb revision) according to our success criteria (a) in the whole cohort, (b) in the subgroup with a preoperative IOP of > 21 mmHg, and (c) in the subgroup with a preoperative IOP of ≤ 21 mmHg, IoGM (20% or more IOP reduction or reduction in the number of glaucoma medication of 2 or more)