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Unadjusted association of respiratory syncytial virus genomic load with the risk of a length of hospital stay (LOS) of ≥3 days in children hospitalized for bronchiolitis. The fitted line represents locally weighted scatterplot smoothed (lowess) curve. Lower threshold cycle (CT) values indicate higher RSV genomic loads. There was a positive relationship between RSV genomic load (an inverse of the CT value) and the risk of a LOS of ≥3 days (P < .001).
