Epidemiology Flashcards
What statistical test do you use for interval data for 3 or more groups of independent data? What is the non-parametric alternative? What do you use if a confounder is present?
- ANOVA (1 DV) or MANOVA (2 or more DVs)
- non-parametric alternative: Kruskai-Wallis
- if confounder is present: ANCOVA (1 DV) or MANCOVA (2 ore more DVs)
What statistical test do you use for interval data for 2 groups of paired/related data? What is the non-parametric alternative?
Paired t-test
*non-parametric alternative: Wilcoxon signed rank
What statistical test do you use for 3 or more groups of paired/related interval data? What is the non-parametric alternative? What if confounders are present?
Repeated measures ANCOVA (1 DV) or MANCOVA (2 or more DVs)
- non-parametric alternative: Friedman
- confounders present: repeated measures ANCOVA (1 DV) or MANCOVA (2 or more DVs)
What statistical test do you use for interval data for 2 groups of independent data? What is the non-parametric alternative?
- student t-test
* non-parametric alternative: Mann-Whitney
What type of statistical test do you use for membership prediction or association for interval data? What is the non-parametric alternative?
Linear regression
*non-parametric alternative: multinomial logistic regression
What type of statistical test do you use for time-to-event or survival for interval data? What is the non-parametric alternative?
Kaplan-Meier product limit estimate
*non-parametric alternative: Cox proportional hazards
What statistically test do you use for measure of correlation of interval data? What is the non-parametric alternative?
Pearson correlation
*non-parametric alternative: Spearman correlation
What are the post-hoc tests for 3 ore more group comparisons for interval data?
Student-newman-keul test Dunnett test Dunn test Tukey or scheffe test Bonferroni correction
What statistical test is used for 2 group of independent nominal data? What is expected cell count is less than 5?
Chi-square
*less than 5: Fisher’s exact
What statistical test is used for 3 or more groups of independent nominal data? What is expected cell count is less than 5?
Chi-square
*less than 5: Fischer’s exact
What statistical test is used for 2 groups of paired/related nominal data?
McNemar
What statistical test is used for 3 or more groups of paired/related nominal data?
Cochran
What statistical test is used for proportion of events (survival) of nominal data?
Log-rank
What statistical test is used for measures of correlation of nominal data?
Contingency coefficient
What type of statistical test is used for prediction/association (regression) of nominal data?
Logistic regression
What statistical test is used for 2 groups of independent ordinal data?
Mann-Whitney
What statistical test is used for 3 or more groups of independent ordinal data?
Kruskal-Wallis
What statistical test is used for 2 groups of paired/related ordinal data?
Wilcoxon signed rank
What statistical test is used for 3 or more groups of paired/related ordinal data?
Friedman
What statistical test is used for proportion of event (survival) of ordinal data?
Cox proportional hazards
What statistical test is used for measure of correlation for ordinal data?
Spearman correlation
What statistical test is used for prediction/association (regression) of ordinal data?
Multinomial logistic regression
Describe nominal data and give an example of this type of data
- Nominal data is dichtomous/binary; non-ranked name categories
- No magnitude/consistency of scale/rational zero
- ALL data that is forced into 2 categories is nominal (diseased/non-diseased, hypertensive/non-hypertensive)
- Ex: Race
Describe ordinal data and give an example of this data type
- Ranked categories; non-equal distances
- Yes magnitude, no consistency of scale/rational zero
- Class example is categorical in nature. Survey’s that ask “how satisfied are you” are examples of ordinal data. Many people believe that pain scales are ordinal