A Study on The Psychometric Properties of Revised-Nonverbal Pain Scale and Original-Nonverbal Pain Scale in Iranian Nonverbal-Ventilated Patients
Hoda Chookalayi, Mohammad Hasanpour, Sajjad Jabrailzadeh, Fatemeh Sadeghpour
Instrument, Intensive Care Unit, mechanical ventilation, pain, pain measurement
Citation Information :
Chookalayi H, Hasanpour M, Jabrailzadeh S, Sadeghpour F. A Study on The Psychometric Properties of Revised-Nonverbal Pain Scale and Original-Nonverbal Pain Scale in Iranian Nonverbal-Ventilated Patients. Indian J Crit Care Med 2017; 21 (7):429-435.
Background and Aims: The nonverbal pain scale is one of the instruments which study pain in nonverbal-ventilated patients with regard to the changes of behavioral and physiological indices. The purpose of the study is to survey the psychometric properties of revised-nonverbal pain scale (R-NVPS) and original-nonverbal pain scale (O-NVPS) in ventilated patients hospitalized in critical care units. Materials and Methods: Four nurses studied pain in sixty patients hospitalized in trauma, medical, neurology, and surgical critical care units using R-NVPS and O-NVPS at six times (before, during, and after nociceptive and nonnociceptive procedures). The test was repeated in 37 patients after 8–12 h. Results: Cronbach's alpha coefficient for R-NVPS and O-NVPS was 0.8 and 0.76, respectively. The inter-rater correlation coefficient during different times was r = 0.89–0.96 for R-NVPS and r = 0.80–0.87 for O-NVPS. Test-retest correlation coefficient for R-NVPS and O-NVPS was r = 0.55–0.86 and r = 0.51–0.75, respectively. The meaningful difference in pain score between nociceptive and nonnociceptive procedures (P < 0.001) and a higher pain score in patients who confirmed pain (P < 0.001) showed a discriminant and criterion validity for both scales of NVPS, respectively. Conclusions: R-NVPS and O-NVPS can both be used as valid and reliable scales in studying pain in ventilated patient. However, in comparing the items, “respiration” (R-NVPS) had a higher sensitivity than “physiology II” (O-NVPS) in assessing pain.
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