title: Effect of bupropion SR on specific symptom clusters of depression: analysis of the 31-item Hamilton Rating Scale for depression.
abstract: Principal component (PC) analysis is a statistical technique that has been used to identify core depression symptoms on the Hamilton Rating Scale for Depression (HAM-D). PC analysis is also a useful method to identify unidimensional scales of the HAM-D that are more sensitive to change following antidepressant treatment. Although there have been previous PC investigations of various versions of the HAM-D, there have been no investigations of the 31-item HAM-D scale or investigations that include subjects administered bupropion SR. We performed a PC analysis on data from 910 outpatients who participated in randomized, double-blind trials evaluating bupropion SR versus placebo for major depression. The goal of our analysis was to 1) identify components (domains) of the 31-item HAM-D and 2) determine patient response to bupropion SR using the domains identified. PC analysis produced a solution comprised of 7 domains of the HAM-D that accounted for approximately 49% of the total variance. Bupropion SR demonstrated a significant reduction (p<.01, least square mean change) in symptoms over placebo on 4 domains (cognitive, retardation, fatigue/interest, and anxiety items).
authors.affiliation: Department of Clinical Research, Campbell University, Durham, NC 27703, USA. jamerson@mailcenter.campbell.edu
authors.forename: Brenda D
authors.initials: BD
authors.lastname: Jamerson
authors.forename: K Ranga Rama
authors.initials: KR
authors.lastname: Krishnan
authors.forename: Jeremy
authors.initials: J
authors.lastname: Roberts
authors.forename: Alok
authors.initials: A
authors.lastname: Krishen
authors.forename: Jack G
authors.initials: JG
authors.lastname: Modell
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018687:Antidepressive Agents, Second-Generation / Q000008:administration & dosage / Q000627:therapeutic use*; D016642:Bupropion / Q000008:administration & dosage / Q000627:therapeutic use*; D003692:Delayed-Action Preparations; D003865:Major Depressive Disorder / Q000188:drug therapy* / Q000523:psychology*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales
chemical_list: D018687:Antidepressive Agents, Second-Generation; D003692:Delayed-Action Preparations; D016642:Bupropion