In this 2nd edition, all the chapters have been corrected for textual and arithmetic errors, and they contain updated versions of the background information, scienti?c question information, examples, and conclusions sections. In “notes section”, updated references helpful to a better understanding of the brief descriptions in the current text are given. Instead of the, previously published, two-20-chapter Springer briefs, one for simple and one for complex data, this 2nd edition is produced as a single 60-chapter textbook. The, previously used, rather arbitrary classi?cation has been replaced with three parts, according to the most basic differences in data ?le characteristics:
1. Continuous outcome data (36 chapters)
2. Binary outcome data (18 chapters)
3. Survival and longitudinal data (6 chapters)