Given the fact that there has been heavy correlation discovered with that of narcolepsy and the presence of depression and anxiety, coupled with a rising correlation of simultaneous appearances with narcolepsy and ADHD, it is therefore inferred that the three aforementioned psychological comorbidities have an association with narcolepsy; however, such studies did not examine specific narcolepsy types and their effects on such comorbidities by itself. 

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There are two types of narcolepsy: Type 1 (with cataplexy) and Type 2 (without cataplexy). Albeit cataplexy is the most common divider between the two types, there are multiple differences in specific activated hormones, therefore justifying examination of how narcolepsy type correlates with comorbidity susceptibility. 

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Two questionnaires were used to gather adequate participation from volunteers, and those who replied were then separated into either the control group, Type 1 group, or Type 2 group. A set consisting of three different questionnaires (Beck Depression Inventory, PROMIS Emotional Distress: Anxiety, and Wender Utah Rating Scale for the Attention Deficit Hyperactivity Disorder) was then issued to measure each participant’s severity level of depression, anxiety, and ADHD, respectively.   

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Results found that the control group had the least levels of severity for every comorbidity. Those with Type 1 were more susceptible to being diagnosed with a more severe form of anxiety whilst Type 2 was more susceptible to ADHD and depression. However, given the small sample size, error bars overlap and therefore these assumptions cannot be stated as statistically significant.