Premium
Sample size and the study of F waves
Author(s) -
Nobrega João Antonio Maciel,
Manzano Gilberto Mastrocola,
Novo Neil Ferreira,
Monteagudo Patricia Teófilo
Publication year - 1999
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199909)22:9<1275::aid-mus17>3.0.co;2-6
Subject(s) - sample size determination , ulnar nerve , audiology , sample (material) , medicine , psychology , mathematics , statistics , physics , surgery , elbow , thermodynamics
Ulnar nerve F waves were studied in 23 healthy volunteers and 27 diabetic patients. Latencies and chronodispersion were analyzed in each group for different sample sizes. Significant differences were not detected with the different sample sizes for mean latencies, with samples above 16 stimuli or 10 waves for minimum and maximum latencies and above 20 stimuli or 16 waves for chronodispersion.These findings suggest that these limits may be adequate for group comparison. However, for the analysis of individual patients, the evidence suggests that larger samples are required for the determination of the minimum and maximum latencies and chronodispersion. © 1999 John Wiley & Sons, Inc. Muscle Nerve 22: 1275–1278, 1999.