Author pages are created from data sourced from our academic publisher partnerships and public sources.
Understanding logistic regression analysis
- S. Sperandei
- Mathematics, Medicine
- Biochemia medica
- 1 February 2014
Logistic regression is used to obtain odds ratio in the presence of more than one explanatory variable. The procedure is quite similar to multiple linear regression, with the exception that the… Expand
Adherence to physical activity in an unsupervised setting: Explanatory variables for high attrition rates among fitness center members.
OBJECTIVES To evaluate the attrition rate of members of a fitness center in the city of Rio de Janeiro and the potential explanatory variables for the phenomenon. DESIGN An exploratory,… Expand
Repeatability of the evaluation of systemic microvascular endothelial function using laser doppler perfusion monitoring: clinical and statistical implications
OBJECTIVE: An awareness of the repeatability of biological measures is required to properly design and calculate sample sizes for longitudinal interventional studies. We investigated the day-to-day… Expand
HIV, HCV, HBV, and syphilis among transgender women from Brazil
Abstract Different sampling strategies, analytic alternatives, and estimators have been proposed to better assess the characteristics of different hard-to-reach populations and their respective… Expand
Reproducibility of methods used for the assessment of autonomous nervous system's function
OBJECTIVE The objective of this study is to investigate the influence of the day-to-day variability of the measures of heart rate variability (HRV) on the sample size calculation for the study of… Expand
Is the Frequency in Somatosensory Electrical Stimulation the Key Parameter in Modulating the Corticospinal Excitability of Healthy Volunteers and Stroke Patients with Spasticity?
- M. A. C. Garcia, J. M. Y. Catunda, Márcio Nogueira de Souza, A. Fontana, S. Sperandei, C. Vargas
- Neural plasticity
- 6 January 2016
Somatosensory electrical stimulation (SES) has been proposed as an approach to treat patients with sensory-motor impairment such as spasticity. However, there is still no consensus regarding which… Expand
Assessing respondent-driven sampling: A simulation study across different networks
- S. Sperandei, L. Bastos, M. Ribeiro-Alves, Francisco I. Bastos
- Computer Science, Mathematics
- Soc. Networks
The purpose was to assess RDS estimators in populations simulated with diverse connectivity characteristics, incorporating the putative influence of misreported degrees and transmission processes. Expand
Physical activity overcomes the effects of cumulative work time on hypertension prevalence among Brazilian taxi drivers.
AIM The aim of this study was to assess the physical activity profile of taxi drivers and its relationship with hypertension prevalence in this group of workers. METHODS Cross sectional exploratory… Expand
Support for sport events and the economy of appearances: a case study of the 2011 World Rally Championship in Australia.
Comment on: Hegde et al. Effect of 3-Month Yoga on Oxidative Stress in Type 2 Diabetes With or Without Complications: A Controlled Clinical Trial. Diabetes Care 2011;34: 2208–2210
- S. Sperandei
- Diabetes Care
- 11 May 2012
I read with great interest the article by Hegde et al. (1), which investigated the effects of 3-month yoga practice on oxidative stress, glycemic control, blood pressure control, and anthropometry in… Expand