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Table 2 Diagnostic criteria for FASD using the 2005 Canadian Diagnostic Guidelines [3]

From: Prevalence and characteristics of adults with fetal alcohol spectrum disorder in corrections: a Canadian case ascertainment study

  Growth Face CNS PAE
FAS Evidence of prenatal growth impairment, as in at least 1 of:
- Birth weight/length ≤ 10th percentile for GA
- Height/weight ≤ 10th percentile for age
- Disproportionately low weight-height ratio (= 10th percentile)
Simultaneous presentation of all 3 sentinel facial features
- Short palpebral fissure length (≤ 2 SD below mean)
- Smooth or flattened philtrum (rank 4 or 5)a
- Thin upper lip (rank 4 or 5)a
Evidence of impairment in ≥3 CNS domains: Confirmed or unconfirmed PAE
pFAS Simultaneous presentation of 2 sentinel facial features (as above) Impairment in ≥3 CNS domains Confirmed PAE
ARND Impairment in ≥3 CNS domains Confirmed PAE
  1. FAS Fetal Alcohol Syndrome, pFAS partial Fetal Alcohol Syndrome, ARND Alcohol Related Neurodevelopmental Disorder, GA Gestational Age, PAE Prenatal alcohol exposure, CNS Central Nervous System. aPhiltrum and upper lip were ranked following the 4-digit diagnostic code and lip/philtrum guide [33]