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Intra‐individuals and inter‐ and intra‐observer reliability of short‐term heart rate variability in adolescents
Author(s) -
Farah Breno Quintella,
Lima Aluísio Henrique Rodrigues de Andrade,
Cavalcante Bruno Remígio,
Oliveira Luciano Machado Ferreira Tenório,
Brito Anísio Luiz da Silva,
Barros Mauro Virgílio Gomes,
RittiDias Raphael Mendes
Publication year - 2016
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/cpf.12190
Subject(s) - medicine , intraclass correlation , heart rate variability , supine position , reproducibility , standard deviation , coefficient of variation , statistics , confidence interval , reliability (semiconductor) , standard error , rr interval , correlation coefficient , cardiology , heart rate , mathematics , blood pressure , power (physics) , physics , quantum mechanics
Summary Background To examine the reliability of heart rate variability ( HRV ) parameters in adolescents and to analyse the inter‐ and intra‐observer reliability of data analysis. Methods The sample included 27 adolescents aged 14–19 years old. RR intervals were obtained for 10 min in the supine position on two different days (Day 1 and Day 8) with an interval of 7 days to analyse intra‐individual reliability. The signals obtained on Day 1 were used to analyse the inter‐ and intra‐observer reliability of HRV parameters. The RR intervals, standard deviation of all RR intervals ( SDNN ), root mean square of the squared differences between adjacent normal RR intervals ( RMSSD ), the percentage of adjacent intervals over 50 ms ( PNN 50), and low ( LF ) and high ( HF ) frequencies were obtained. Frequency‐domain variables were analysed using the autoregressive ( AR ) and fast Fourier transform ( FFT ) methods. Results There were no intra‐individuals difference in RR intervals between Day 1 and Day 8 ( P >0·05). The intraclass correlation coefficient ( ICC ) ranged from 0·647 to 0·913, whereas the coefficient of variation ( CV ) was lower than 20% for all parameters, except PNN 50 and LF / HF . The inter‐ and intra‐observer reliability ranged from 0·915 to 0·996 and 0·990 to 0·993, respectively. In addition, the CV was lower than 20% (inter‐observer) and 7% (intra‐observer) to all HRV parameters. Conclusion Indicators of reproducibility obtained in this study suggest that HRV can be used in adolescents; however, the analysis of HRV parameters should be performed by the same person.