Concurrent validity of the static and dynamic measures of inspiratory muscle strength: comparison between maximal inspiratory pressure and s-index
Rev. bras. cir. cardiovasc
; 35(4): 459-464, July-Aug. 2020. tab, graf
Article
in English
| LILACS, Sec. Est. Saúde SP
| ID: biblio-1137286
Responsible library:
BR1.1
ABSTRACT
Abstract Objective:
To verify the concurrent validity between the inspiratory muscle strength (IMS) values obtained in static (maximal inspiratory pressure [MIP]) and dynamic (S-Index) assessments.Methods:
Healthy individuals were submitted to two periods of evaluation i) MIP, static maneuver to obtain IMS, determined by the Mueller's maneuver from residual volume (RV) until total lung capacity (TLC); ii) and S-Index, inspiration against open airway starting from RV until TLC. Both measures were performed by the same evaluator and the subjects received the same instructions. Isolated maneuvers with differences < 10% were considered as reproducible measures.Results:
Data from 45 subjects (21 males) were analyzed and that showed statistical difference between MIP and S-Index values (133.5 ± 33.3 and 125.6 ± 32.2 in cmH2O, respectively), with P=0.014. Linear regression showed r2=0.54 and S-Index prediction formula = 39.8+(0.75×MIP). Pearson's correlation demonstrated a strong and significant association between the measures with r=0.74. The measurements showed good concordance evidenced by the Bland-Altman test.Conclusion:
S-Index and MIP do not present similar values since they are evaluations of different events of the muscular contraction. However, they have a strong correlation and good agreement, which indicate that both are able to evaluate the IMS of healthy individuals.
Full text:
Available
Collection:
National databases
/
Brazil
Database:
LILACS
/
Sec. Est. Saúde SP
Main subject:
Respiratory Muscles
/
Maximal Respiratory Pressures
Type of study:
Prognostic study
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Rev. bras. cir. cardiovasc
Year:
2020
Document type:
Article
Institution/Affiliation country:
Universidade Federal do Rio de Janeiro/BR