Reliability and validity of methods in the assessment of cold-induced shivering thermogenesis.
Eur J Appl Physiol
; 120(3): 591-601, 2020 Mar.
Article
em En
| MEDLINE
| ID: mdl-31955279
ABSTRACT
PURPOSE:
To compare two analytical methods for the estimation of the shivering onset inflection point, segmental regression and visual inspection of data, and to assess the test-retest reliability and validity of four metrics of shivering measurement; oxygen uptake (VÌO2), electromyography (EMG), mechanomyography (MMG) and bedside shivering assessment scale (BSAS).METHODS:
Ten volunteers attended three identical experimental sessions involving passive deep-body cooling via cold water immersion at 10 °C. VÌO2, EMG, and MMG were continuously assessed, while the time elapsed at each BSAS stage was recorded. Metrics were graphed as a function of time and rectal temperature (Tre). Inflection points for intermittent and constant shivering were visually identified for every graph and compared to segmental regression.RESULTS:
Excellent agreement was seen between segmental regression and visual inspection (ICC, 0.92). All measurement metrics presented good-to-excellent test-retest reliability (ICC's > 0.75 and 0.90 respectively), with the exception of visual identification of intermittent shivering for VÌO2 measurement (ICC, 0.73) and segmental regression for EMG measurement (ICC, 0.74). In the assessment of signal-to-noise ratio (SNR), EMG showed the largest SNR at the point of shivering onset followed by MMG and finally VÌO2.CONCLUSIONS:
Segmental regression provides a successful analytical method for identifying shivering onset. Good-to-excellent reliability can be seen across VÌO2, EMG, MMG, and BSAS, yet given the observed lag times, SNRs, along with known advantages/disadvantaged of each metric, it is recommended that no single metric is used in isolation. An integrative, real-time measure of shivering is proposed.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Estremecimento
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Eletromiografia
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Eur J Appl Physiol
Assunto da revista:
FISIOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Reino Unido