Abstract:
STUDY OBJECTIVE:To determine if a training session using videotaped metered dose inhaler (MDI) performances can result in high interrater and intrarater reliability of five evaluators assessing MDI technique. DESIGN:Five evaluators (three pharmacists, two pulmonary fellows) were trained to evaluate MDI technique during a 2-h training session. The training session consisted of verbal instruction and practical experience in evaluating MDI technique using video-taped MDI performances of six nonstudy subjects. After the training session, the evaluators independently observed the same videotaped MDI demonstrations of 14 subjects on two occasions separated by a 7- to 10-day interval. Interrater and intrarater reliability was determined for individual steps by calculating percent agreement and intraclass correlation (ICC) coefficient. RESULTS:Interrater. The interrater reliability for individual steps ranged from 29 to 86 percent (ICC coefficient = 0.13 to 0.81). Steps in which evaluators were in agreement for less than 9 of the 14 subjects were shaking the inhaler before inhalation, exhaling, continuing to inhale slowly, and adequate breath hold. Intrarater: The overall percent agreement by step ranged from 74 to 97 percent. Exhaling to functional residual volume (76 percent) and continuing to inhale slowly and deeply (74 percent) had the lowest overall agreement between the first and second observation day. The consistency of evaluating a step between the two observation days varied considerably depending on the step and evaluator. CONCLUSIONS:High interrater and intrarater reliability in MDI evaluation is difficult to obtain. Clinicians and researchers involved in MDI evaluation and education should be trained to achieve consistency. A single training session using videotaped MDI demonstrations was not adequate in achieving consistency among evaluators. To improve accuracy of research results, researchers should include at least two evaluators to assess MDI technique or take other measures to show and report reliability.
journal_name
Chestjournal_title
Chestauthors
Gray SL,Nance AC,Williams DM,Pulliam CCdoi
10.1378/chest.105.3.710subject
Has Abstractpub_date
1994-03-01 00:00:00pages
710-4issue
3eissn
0012-3692issn
1931-3543pii
S0012-3692(15)43940-6journal_volume
105pub_type
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