title: Intra- and inter-rater reliability of maximum inspiratory pressure measured using a portable capsule-sensing pressure gauge device in healthy adults.
abstract: BACKGROUND
  Measurement of maximum inspiratory pressure is the most prevalent method used in clinical practice to assess the strength of the inspiratory muscles. Although there are many devices available for the assessment of inspiratory muscle strength, there is a dearth of literature describing the reliability of devices that can be used in clinical patient assessment. The capsule-sensing pressure gauge (CSPG-V) is a new tool that measures the strength of inspiratory muscles; it is easy to use, noninvasive, inexpensive and lightweight.
  
  
  OBJECTIVE
  To test the intra- and inter-rater reliability of a CSPG-V device in healthy adults.
  
  
  METHODS
  A cross-sectional study involving 80 adult subjects with a mean (± SD) age of 22±3 years was performed. Using simple randomization, 40 individuals (20 male, 20 female) were used for intrarater and 40 (20 male, 20 female) were used for inter-rater reliability testing of the CSPG-V device. The subjects performed three inspiratory efforts, which were sustained for at least 3 s; the best of the three readings was used for intra- and inter-rater comparison. The intra- and inter-rater reliability were calculated using intraclass correlation coefficients (ICCs).
  
  
  RESULTS
  The intrarater reliability ICC was 0.962 and the inter-rater reliability ICC was 0.922.
  
  
  CONCLUSIONS
  Results of the present study suggest that maximum inspiratory pressure measured using a CSPG-V device has excellent intraand inter-rater reliability, and can be used as a diagnostic and prognostic tool in patients with respiratory muscle impairment.
authors.affiliation: Sancheti Institute College of Physiotherapy, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Nikita S
authors.initials: NS
authors.lastname: Jalan
authors.affiliation: Sancheti Institute College of Physiotherapy, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Sonam S
authors.initials: SS
authors.lastname: Daftari
authors.affiliation: Sancheti Institute College of Physiotherapy, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Seemi S
authors.initials: SS
authors.lastname: Retharekar
authors.affiliation: Sancheti Institute College of Physiotherapy, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Savita A
authors.initials: SA
authors.lastname: Rairikar
authors.affiliation: Sancheti Institute for Orthopaedics & Rehabilitation, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Ashok M
authors.initials: AM
authors.lastname: Shyam
authors.affiliation: Sancheti Institute for Orthopaedics & Rehabilitation, Maharashtra University of Health Sciences, Pune, Maharashtra, India.
authors.forename: Parag K
authors.initials: PK
authors.lastname: Sancheti
keywords: Inter-rater reliability; Intrarater reliability; MIP; Maximal inspiratory pressure; Noninvasive device for maximum inspiratory pressure measurement