title: Development and validation of the scale to assess satisfaction with medications for addiction treatment-methadone for heroin addiction (SASMAT-METHER).
abstract: OBJECTIVE
  To develop and examine the psychometric properties of a scale to specifically assess satisfaction with methadone in heroin-dependent patients.
  
  
  METHODS
  The 44-item preliminary version of the scale to assess satisfaction with medications for addiction treatment-methadone for heroin addiction (SASMAT-METHER) was obtained from a pool of items designed to assess satisfaction with any medication-addiction combination. Theoretical domains of the initial SASMAT-METHER were overall satisfaction, pharmacotherapy, initiation, anti-addictive effect on heroin, mental state, physical state, personal functioning, acceptability, and anti-addictive effect on secondary substances. The Treatment Satisfaction Questionnaire for Medication 1.4 version (TSQM 1.4) and the Verona Service Satisfaction Scale for Methadone Treatment (VSSS-MT) were used for concurrent validation. Participants included heroin-dependent patients receiving methadone treatment for at least the last 3 months.
  
  
  RESULTS
  The preliminary version of the SASMAT-METHER scale was completed by 241 patients, with 180 surveys considered suitable for factor analysis. Principal component analysis of these SASMAT-METHER surveys revealed a 3-factor structure that accounted for 40.4% of total variance. Based on similarities between empirically-obtained factors and theoretical domains, factors 1 through 3 were named 'Personal Functioning and Well-Being' (7 items), 'Anti-Addictive Effect on Heroin' (5 items), and 'Anti-Addictive Effect on Other Substances' (5 items). All factors showed good to excellent internal consistency (Cronbach's α: 0.83-0.92) and test-retest reliability (intraclass correlation coefficients: 0.66-0.89). Correlations between overall SASMAT-METHER and TSQM 1.4 scores were stronger (Pearson r=0.69) than correlations between overall SASMAT-METHER and VSSS-MT scores (Pearson r=0.26).
  
  
  CONCLUSIONS
  These results present evidence for the validity and reliability of SASMAT-METHER.
authors: Addictive Behaviours Unit, Department of Psychiatry, Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Autonomous University of Barcelona School of Medicine, Sant Antoni Maria Claret 167, 08025 Barcelona, Spain. Electronic address: jperezc@santpau.cat.
authors: José Pérez
authors: JP
authors: de los Cobos
authors: Addictive Behaviours Unit, Department of Psychiatry, Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Autonomous University of Barcelona School of Medicine, Sant Antoni Maria Claret 167, 08025 Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain.
authors: Joan
authors: J
authors: Trujols
authors: Addictive Behaviours Unit, Department of Psychiatry, Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Autonomous University of Barcelona School of Medicine, Sant Antoni Maria Claret 167, 08025 Barcelona, Spain.
authors: Núria
authors: N
authors: Siñol
authors: Addictive Behaviours Unit, Department of Psychiatry, Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Autonomous University of Barcelona School of Medicine, Sant Antoni Maria Claret 167, 08025 Barcelona, Spain.
authors: Francesca
authors: F
authors: Batlle
mesh_terms: D000328:Adult; D005260:Female; D006556:Heroin Dependence / Q000188:drug therapy* / Q000523:psychology; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use*; D008875:Middle Aged; D017060:Patient Satisfaction; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
chemical_list: D008691:Methadone
keywords: Factor structure; Heroin addiction; Methadone; Patient satisfaction; Validation study