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Questions related from Emilio Pariente-Rodrigo
When I run a contingency table NxN and I get a significant result with the chi-square test, is there a post-hoc test in SPSS to address the comparisons? Or should I run logistic...
02 February 2017 3,265 1 View
Dear All I have a questionnaire with 9 items and binary data. After running a factorial analysis, I have discovered 4 principal components and I want to assess the internal consistency in each one...
02 February 2016 6,009 9 View
Dear All I have a patient, african-american professional sportsman.Asymptomatic, in a pre-participation screening, ECG was abnormal, with minor inverted T-waves in V4-V6 leads. There are neither...
11 November 2014 9,178 0 View
I am using SPSS and my model is: 3 raters, two-way mixed effects, absolute agreement. Data are far from normality, I do not know a non parametric procedure and I do prefer not to categorize the...
11 November 2013 272 9 View
I want to check multicollinearity in a logistic regression model, with all independent variables expressed as dichotomous. Given that I can not use VIF, is the correlation matrix the only...
09 September 2013 2,423 22 View
I am interested in developing a split-sample technique to assess the internal validation of a logistic regression. Many statistics have been used to compare both groups, training sample and...
07 July 2013 5,107 14 View
There is a general trend to do log-transformations when we face skewed and non-normal distributions. However, it is quite unusual that the authors assess the (real) possibility of having biased...
06 June 2013 4,978 4 View
I want to know the influence of HRQOL on the utilization of primary care services, in a multi-adjusted linear regression model. In order to assess the five dimensions of EuroQol-5D as an...
06 June 2013 4,812 4 View
If we want to adjust by age in a case-control study, we could do a matching 1:N by age (conditional logistic regression) or just consider age as another covariate in the model, without a matching...
06 June 2013 9,751 1 View
I have conducted a no-conditional logistic regression analysis to know the relationship between spine osteoarthritis and vertebral fracture in males over 50 years. The validation of the model has...
06 June 2013 6,243 2 View
Sometimes it is not useful at all, specially in very skewed distributions, with many values=0. We don´t get the normality, and the problem goes on. Moreover, it seems "going downstairs" to use a...
05 May 2013 8,796 2 View
I have developed a case-control study, matched 1:2, and I have addressed the conditional logistic regression analysis with COXREG (SPSS), via recode. The model runs OK (confirmed with Stata). My...
05 May 2013 1,751 0 View
In a multivariate analysis, the adjustment of level alpha with the method of Bonferroni may lead us to a type II-error.
05 May 2013 8,381 2 View
