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Table 1 Inclusion criteria

From: Efficacy of nicotine administration on obsessions and compulsions in OCD: a systematic review

Study design Open-label, cross-sectional, randomized controlled trials, case series, case reports
OCD diagnosis OCD diagnosis according to DSM-III, DSM III-R, DSM-IV, DSM-IV-TR, or DSM-5a
Assessment methods for clinical improvement Self-, physician- or computer-administered questionnaires, semi-structured interviews
Outcomes Reduction of obsessions and/or compulsions
Languages of publication Any language
Country Any country
Year of publication Any year
Population OCD patients
Gender Male and female
Age range 18–65 years
  1. a[7,8,9,10, 12]