Biostatistics & Data Science Services
Biostatistics
My Working Principles
Assistance
For each article and dataset pair, once a one-time advance payment is received, I remain by your side as your assistant until our work with that article and dataset is completed.
Research
Beyond the main objective of the article, I uncover additional findings related to the dataset that may be useful to you either immediately or later.
Educational Approach
From the fundamentals to advanced topics in biostatistics, I ensure that the people I work with gain knowledge of the subject, and I conduct sessions solely for educational purposes.
PubMed Quality
From the tests we use to the text, tables, and graphics, I produce high-quality content suitable for the medical field, reinforced with examples from PubMed publications I have been involved in or not.
Biostatistical Techniques
Some of the techniques (not limited to these) for general information:
- Descriptive statistics (mean, median, standard deviation)
- Normality tests (Shapiro–Wilk, Kolmogorov–Smirnov)
- Correlation analyses (Pearson, Spearman; including Bland–Altman for clinical measurement agreement)
- Regression models (linear, logistic; multivariable models as advanced)
- Hypothesis tests
- Pre–post comparisons: Paired t-test, Wilcoxon
- Between groups: Student t-test, Mann–Whitney U
- Multiple group comparison: ANOVA, Kruskal–Wallis
- Time series analyses (ARIMA, trend and seasonal assessment; health data monitoring analyses)
- Survival analyses (Kaplan–Meier, Cox regression; treatment duration effectiveness evaluation)
- Multivariate data analyses (Principal Component Analysis – PCA; Factor analysis)
- Clustering and classification methods (k-means, hierarchical clustering; advanced Random Forest)
- ROC curve and cut-off optimization
- Confidence interval calculations
- Effect size analyses (Cohen’s d etc.)
- Sample size and power analyses
- Machine learning-based modeling (limited advanced methods such as support vector machines)
- Missing data methods (multiple imputation and advanced techniques)
