Using pilot data to estimate sample size and compare question forms for a crossover study

Journal of Occupational Health

Volumn 40, Issue 4, 1998, Pages 307-312

  Dong, Maxia ^a   Petersen, Martin R ^a   Mendell, Mark J ^a  

^a NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH   (United States)

Author keywords

Crossover study; Indoor air; Intervention; Office worker; Pilot study; Questionnaire; Sample size; Visual Analog Scale (VAS)

Indexed keywords

AIR QUALITY; AMBIENT AIR; ARTICLE; CLINICAL ARTICLE; CLINICAL TRIAL; CROSSOVER PROCEDURE; EYE DISEASE; HEADACHE; HUMAN; PAIN ASSESSMENT; QUESTIONNAIRE; SELF REPORT; SYMPTOMATOLOGY;

EID: 0032431520     PISSN: 13419145     EISSN: None     Source Type: Journal    
DOI: 10.1539/joh.40.307     Document Type: Article

References (11)

1. Aitken RCB. Measurement of feelings using visual analogue scales. Proc R Soc Med 1969; 62: 989-993.
2. th International Conference on Indoor Air Quality and Climate, Nagoya, Japan, 1996, Vol. 2, 923-928.
3. Mador MJ, Kufel TJ. Reproducibility of visual analog scale measurements of dyspnea in patients with chronic obstructive pulmonary disease. Am Rev Respir Dis 1992; 146: 82-87.
4. Thomee R, Grimby G, Wright BD, Linacre JM. Rasch analysis of visual analog scale measurements before and after treatment of Patellofemoral Pain Syndrom in women. Scand J Rehabil Med 1995; 27: 145-151.
5. Quiding H, Okasala E, Happeonen RP, et al. The visual analog scale dose evaluations of analgesics. J Cli Pharmacol 1981; 21: 424-429.
6. Fritz G, Spirito A, Yeung A, Klein R, Freedman E. A pictorial visual analog scale for rating severity of childhood asthma episodes. J Asthma 1994; 31: 473-478.
7. Sriwatanakul K, Kelvie W, Lasagna L, et al. Studies with different types of visual analog scale for measurement of pain. Clin Pharmacol Ther 1983; 34: 234-239.
8. SAS Institute Inc. SAS/STAT User's Guide (vol. 2) Version 6, 6.04 Edition, NC, U.S.A. Cary. 1994.
9. Maxwell C. Sensitivity and accuracy of the visual analogue scale: a psychophysical classroom experiment. Br J Clin Pharmacol 1978; 6: 15.
10. Dexter F, Chestnut DH. Analysis of statistical tests to compare visual analog scale measurements among groups. Anesthesiology 1995; 82: 896-902.
11. Senn S. Cross-over Trials in Clinical Research, Chichester. England, John Wiley & Sons, 1993.