Psychometric properties of the Brief Symptom Inventory-18 in a Spanish breast cancer sample.
OBJECTIVE
The objective of this work was to study the psychometric and structural properties of the Brief Symptom Inventory-18 (BSI-18) in a sample of breast cancer patients (N=175).


METHODS
Confirmatory factor analyses were conducted. Two models were tested: the theoretical model with the original structure (three-dimensional), and the empirical model (a four-factor structure) obtained through exploratory factor analysis initially performed by the authors of the BSI-18.


RESULTS
The eligible structure was the original proposal consisting of three dimensions: somatization, depression, and anxiety scores. These measures also showed good internal consistency.


CONCLUSIONS
The results of this study support the reliability and structural validity of the BSI-18 as a standardized instrument for screening purposes in breast cancer patients, with the added benefits of simplicity and ease of application.
Galdón
Ma José
MJ
Department of Personality, Assessment, and Psychological Treatments, University of Valencia, Valencia, Spain.
Durá
Estrella
E
Andreu
Yolanda
Y
Ferrando
Maite
M
Murgui
Sergio
S
Pérez
Sandra
S
Ibañez
Elena
E
D000223:Adaptation, Psychological; D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011594:Psychometrics; D015203:Reproducibility of Results; D013030:Spain / Q000208:ethnology; D013315:Stress, Psychological / Q000175:diagnosis* / Q000523:psychology; D011795:Surveys and Questionnaires; D044465:White People / Q000523:psychology / Q000706:statistics & numerical data*