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Unadjusted means (SEM) of HOMA Index across quartiles of weekday sleep duration in sample. Quartiles are based on approximately equally sized groups based on mean actigraph sleep duration during the week where 1 = 3.4–5.41, 2 = 5.41–6.00; 3 = 6.00–6.48; and 4 = 6.48–8.6 hours.
