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Table 3 Identified ROP stage at the time of diagnosis, according to categories of severity of ROP

From: Incidence of retinopathy of prematurity type 1 and type 2 in a regional Hospital of Social Security in the state of Queretaro, Mexico (2017–2018)

  STAGE  
1 2 3 4A 4B TOTAL
n % n % n % n % n % n
non RT 1 18 50.0% 14 38.9% 4 11.1% 36
Mild ROP 17 58.6% 11 37.9% 1 3.4% 29
Type 2 ROP 1 14.3% 3 42.9% 3 42.9% 7
RT 1 1 2.6% 17 44.7% 18 47.4% 1 2.6% 1 2.6% 38
Type 1 ROP 1 2.8% 17 47.2% 18 50.0% 36
Advanced ROP 1 50.0% 1 50.0% 2
All 19 25.7% 31 41.9% 22 29.7% 1 1.4% 1 1.4% 74
  1. 1 RT: requiring treatment