title: Continuing in treatment as a form of selection bias.
abstract: Panic patients who continued treatment (N = 12) did not have symptom scores significantly different from those of patients who declined or discontinued treatment (N = 12) but they did have lower pretreatment MHPG levels. Continuing in treatment may itself cause selection bias for biochemical variables under study.
authors.affiliation: General Adult Clinic, University of Texas Mental Sciences Institute, Houston.
authors.forename: M J
authors.initials: MJ
authors.lastname: Edlund
authors.forename: A C
authors.initials: AC
authors.lastname: Swann
mesh_terms: D000328:Adult; D001008:Anxiety Disorders / Q000097:blood / Q000523:psychology / Q000628:therapy*; D005239:Fear; D005500:Follow-Up Studies; D006801:Humans; D008734:Methoxyhydroxyphenylglycol / Q000097:blood; D010200:Panic; D010349:Patient Compliance; D010352:Patient Dropouts; D010555:Personality Inventory; D011569:Psychiatric Status Rating Scales; D012107:Research Design / Q000592:standards
chemical_list: D008734:Methoxyhydroxyphenylglycol