Idling for Decades: A European Study on Risk Factors Associated with the Delay Before a Narcolepsy Diagnosis.

In other words, when the data of the independent variable (year of symptom onset) are 2016, 2017, 2018 and 2019, the corresponding values of the dependent variable (diagnostic delay) are limited to respectively zero to four, zero to three, zero to two and zero to one, which obviously inherently supports a decreasing trend. 2) If we assume that the diagnostic delay did not change in the past years, the mean/median of the delays of patients diagnosed in each year should be the same.

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Likewise, the proportion of patients with short delay and the ratio between short delay and long delay did not show an increasing trend in the past decades.

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Wilcoxon rank sum tests confirmed that patients starting EDS at younger age have longer delays than patients who had EDS at relatively older age because P -values are either significant (<0.05) or showed a trend to be significant ( P -values approximate to 0.1, see Supplementary Figure S2 ).

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