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Reliability and Validity of the Spielberger State-Trait Anxiety Inventory (STAI) Among Urological Patients: A Malaysian Study

Quek, K.F. , and Phil, M., and Low, W.Y., and Razack, A.H. , and Loh, C.S. , and Chua, C.B. , (2004) Reliability and Validity of the Spielberger State-Trait Anxiety Inventory (STAI) Among Urological Patients: A Malaysian Study. Medical Journal of Malaysia, 59 (2). pp. 258-267. ISSN 0300-5283

Full text not available from this repository.

Affiliations

University of Malaya. Faculty of Medicine. Health Research Development Unit.
University of Malaya. Faculty of Medicine. Health Research Development Unit.
University of Malaya. Faculty of Medicine. Health Research Development Unit.
Hospital University of Malaya. Dept. of Surgery.
Sunway Medical Centre. Urological Surgeon.
Hospital University of Malaya. Dept. of Surgery.

Abstract

To validate the English version of the Spielberger State-Trait Anxiety Inventory (STAI) in a sample of Malaysian patients with and without urinary symptoms. Validity and reliability were studied in patients with lower urinary tract symptoms (LUTS) and patients without LUTS. Reliability was evaluated using the test-retest method and internal consistency was assessed using Cronbach’s alpha. Sensitivity to change was expressed as the effect size in the preintervention versus post-intervention score in additional patients with LUTS who underwent transurethral resection of the prostate (TURP). Internal consistency was excellent. A high degree of internal consistency was observed for each of the 40 items with Cronbach’s alpha value = 0.38 to 0.89 while the Cronbach’s alpha for the total scores was 0.86. Test-retest correlation coefficients for the 40 items score were highly significant. Intraclass correlation coefficient was high (ICC=0.39 to 0.89). A high degree of sensitivity and specificity to the effects of treatment was observed. A high degree of significant level between baseline and post-treatment scores was observed across nearly half of the items in surgical group but not in the non-LUTS group (control subjects). The STAI is reliable, valid and sensitive to clinical change in a sample of Malaysian patients with and without urinary symptoms.

Item Type:Journal
Keywords:Spielberger State-Trait Anxiety Inventory, Cronbach’s alpha, Intraclass correlation coefficient, Internal consistency, Test-retest reliability and Validity.
Subjects:R Medicine, Dentistry, Pharmacy, Nursing
ID Code:6023

1. Quek KF, Low WY, Razack AH, Loh CS. Psychological effects of treatment for lower urinary tract symptoms. British Journal Urology International, 2000; 86: 630-33.

2. Lukacs B, Leplege A, Mc Carthy C, Comet D. Construction and validation of a BPH specific health related quality of life scale, for medical outcome research studies, In Proceedings of the second International Consultation on Benign Prostatic Hyperplasia (BPH) (eds ATK. Cockett, S. Khoury, Y. Aso et al.), 1994; 139-143. Paris. SCI.

3. Spielberger CD. State-Trait Anxiety Inventory. comprehensive bibliography. Palo Alto, CA: Consulting Psychologists Press. 1983.

4. Cronbach LJ. Coefficient alpha and the internal structure of test. Psychometrika 1951; 16: 297.

5. Deyo RA, Dichr P, Patrick DL. Reproducibility and responsiveness of health status measures. Control Clinical Trials, 1991; 12 (supp 1): 142S-158S.

6. Cohen J. Statistical Power analysis for the Behavioral Sciences New York. Academic Press. 1977; 75-105.

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