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Subjects in surgery arm of CHAT v11

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DuraMater +0 points · 16 days ago

The original CHAT paper had a total of 226 subjects in the surgery arm (early adenotonsillectomy), however in the version 11, there are only 224 subjects in the surgery arm using variable 'had_surgery'. Is there an explanation for the different number of subjects? Is there another surgery arm variable I should use?

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mrueschman +0 points · 16 days ago

I suggest using arm (https://sleepdata.org/datasets/chat/variables/arm) to determine the randomized treatment arm (n=226 in surgery arm).

I'm guessing had_surgery also includes subjects who crossed over from the watchful waiting arm. Some subjects randomized to surgery did not ultimately have surgery, too.