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Table 4 Screening criteria used in premature children for recruitment 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)

  SCREENING CRITERIA  
BW < 1750 g only GA ≤ 34w only BW < 1750 g and GA ≤ 34w Other TOTAL
n % n % n % n % n
non RT 1 7 7.4% 13 13.8% 48 51.1% 26 27.7% 94
Mature Retina 1 10.0% 1 10.0% 1 10.0% 7 70.0% 10
Immature Retina 4 8.3% 8 16.7% 20 41.7% 16 33.3% 48
Mild ROP 2 6.9% 2 6.9% 22 75.9% 3 10.3% 29
Type 2 ROP 0 0.0% 2 28.6% 5 71.4% 0 0.0% 7
RT 1 0 0.0% 4 10.5% 33 86.8% 1 2.6% 38
Type 1 ROP 0 0.0% 3 8.3% 32 88.9% 1 2.8% 36
Advanced ROP 0 0.0% 1 50.0% 1 50.0% 0 0.0% 2
All 7 5.3% 17 12.9% 81 61.4% 27 20.5% 132
  1. 1 RT: requiring treatment