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Vol. 38. Núm. 10.
Páginas 743 (outubro 2019)
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Vol. 38. Núm. 10.
Páginas 743 (outubro 2019)
Letter to the Editor
Open Access
Aortic valve replacement surgery improves the quality of life of octogenarians with severe aortic stenosis
A cirurgia de substituição valvular aórtica melhora a qualidade de vida dos octogenários com estenose aórtica grave
Visitas
3165
Dina Bentoa,
Autor para correspondência
dinabento@gmail.com

Corresponding author.
, Pedro Coelhob, João Lopesb, José Fragatab
a Serviço de Cardiologia, Centro Hospitalar Universitário do Algarve, Faro, Portugal
b Serviço de Cirurgia Cardiotorácica, Hospital de Santa Marta, Centro Hospitalar de Lisboa Central, Lisboa, Portugal
Conteúdo relacionado
Rev Port Cardiol. 2019;38:74110.1016/j.repc.2019.09.005
Afshin Amirpour, Reihaneh Zavar, Javad Shahabi
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Texto Completo

We appreciate your attention to our article1 and your comments on it. The description of the statistical methods may not be clear.

The statistical methodology used was as follows.

Normality was tested with the Kolmogorov-Smirnov test. The eight SF-36 dimensions and the two summary measures at the four established times were compared with the nonparametric Friedman test, and multiple comparisons were then made using one-way analysis of variance. Before applying one-way analysis, we performed a rank transformation of the data, which accounts for the issues associated with variables with non-normal distribution.

In our paper, we omitted to state that we used the Friedman test and a rank transformation of the data prior to application of one-way ANOVA. Rank transformation versions of parametric tests closely mimic the properties of the best-known rank randomization tests (e.g. Spearman's rho, Mann-Whitney U or Wilcoxon T) with moderate to large sample sizes.2

In another article we published on the same subject, the reviewers had the same doubt you had, and we changed the section on statistical methodology accordingly.3 They accepted the justification that we provide in the previous paragraph.

Conflicts of interest

The authors have no conflicts of interest to declare.

References
[1]
D. Bento, P. Coelho, J. Lopes, et al.
A cirurgia de substituição valvular aórtica melhora a qualidade de vida dos octogenários com estenose aórtica severa.
[2]
T. Baguley.
Serious stats: guide to advanced statistics for the behavioral sciences.
Palgrave Macmillan, (2012),
[3]
P.N.M.P. Coelho, L.M.R.P.C. Miranda, P.M.P. Barros, et al.
Quality of life after elective cardiac surgery in elderly patients.
Interact CardioVasc Thorac Surg, 28 (2019), pp. 199-205
Copyright © 2019. Sociedade Portuguesa de Cardiologia
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Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos

Ao assinalar que é «Profissional de Saúde», declara conhecer e aceitar que a responsável pelo tratamento dos dados pessoais dos utilizadores da página de internet da Revista Portuguesa de Cardiologia (RPC), é esta entidade, com sede no Campo Grande, n.º 28, 13.º, 1700-093 Lisboa, com os telefones 217 970 685 e 217 817 630, fax 217 931 095 e com o endereço de correio eletrónico revista@spc.pt. Declaro para todos os fins, que assumo inteira responsabilidade pela veracidade e exatidão da afirmação aqui fornecida.