Table 3

Visual acuity and contrast sensitivity centiles, measured on the Cardiff tests, in the normative sample of the International INTER-NDA standards

Pooled centiles (n=1209)Girls (n=628)Boys (n=581)P value
Visual acuity (logMAR)
 c100.30.30.3
 c250.20.20.2
 c500.20.20.2
 c750.10.10.1
 c900.10.10.1
 Median (IQR)0.2 (0.1–0.2)0.2 (0.1–0.2)0.2 (0.1–0.2)0.463
Contrast sensitivity (%)
 c102.02.02.0
 c251.81.61.9
 c501.51.51.5
 c751.01.01.0
 c901.01.01.0
 Median (IQR)1.5 (1.0–2.0)1.5 (1.0–1.5)1.5 (1.0–2.0)0.303
  • *P value from Wilcoxon rank-sum test.

  • INTER-NDA, INTERGROWTH-21st Neurodevelopment Assessment.