#Zika just keeps on giving... 
"Below-average neurodevelopment and/or abnormal eye or hearing assessments were noted in 31.5% of children between 7 and 32 months of age."https://www.nature.com/articles/s41591-019-0496-1 …
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From the paper: "A Bayley-III score within 1 s.d. above or below the norm of 100 was considered normal...A score of .... 1–2 s.d. below the norm (< 85 to 70) [was considered] moderately below average. A score... 2 s.d. below the norm [was considered] well below average (<70). "
Yeah, I’m not really sure that tells us much? Again, the most critical question here is, what would the distribution look like in a matched control group?
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Don’t let nitpicking over an imperfect study cloud the fact that 31% of the surviving infants and toddlers had neurodevelopment and neurosensory issues. That number is high no matter how you look at it. This is an important study to draw attention to a devastating problem.
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No control group = nitpicking? Not exactly. The main problem is that we don't know what expected values for these scores are, so it's impossible to assess what can be concluded from the study - incl. the 31% "below-average neuro-development and/or abnormal eye or hearing assess."
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And unfortunately, matched control groups are a weakness of many of the cohorts assembled during the outbreak....
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