| True | False |
| Epidemiological studies can be used to describe the health status of a population |
| Epidemiological studies cannot be used to describe the disease status of a population |
| Epidemiological studies can help to estimate future risk for disease occurrence in of a population |
| Epidemiological studies can identify only minor causes for disease in a population |
| Epidemiological studies can detect social and psychological but not medical or biological factors affecting health |
| Epidemiological studies can find out the probability of positive effect by a specific treatment |
| Epidemiological studies can reveal reasons for differences in the effect between different treatments |
| Descriptive epidemiology uses case-control studies |
| Descriptive epidemiology cannot help to build a basis for health care planning |
| Analytical epidemiology can help to form a basis for specific interventions |
| Studies in descriptive epidemiology can be retrospective |
| Studies in descriptive epidemiology can be prospective |
| Ramdomness in sampling is usually not important for representativeness of an epidemiological study |
| Prevalence of apical periodontitis stays constant with increasing age |
| Prevalence of apical periodontitis is over 10% in people over 60 years |
| The success rate of treatment of apical periodontitis can be over 90 % |
| Succes rate in the treatment of apical periodontitis is not related to the quality of apical seal |
| Short root fillings can cause reduced prognosis |
| Epidemiological studies have related overfillings to reduced prognosis |
| Prevalence of apical periodontitis is higher than prevalence of marginal periodontitis (pocket > 5.5 mm) |