Research on paranoid personality disorder (Edens et al., 2009)suggests that:

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Research suggests that paranoid personality disorder is best represented as a continuous dimension rather than as a discrete category, meaning that individuals may fall along a spectrum of paranoid traits rather than fitting neatly into a diagnostic category. This view is supported by factors such as the high degree of overlap with other personality disorders and inconsistent diagnostic criteria across different versions of the DSM.

Research on Paranoid Personality Disorder (Edens Et Al