Neither usually occurs in case control studies. Both are likely to occur. Children were asked to remember subjective experiences, and the adults were asked for sensitive information. There were opportunities for chance variations to occur. There is strong evidence for a lack of precision.
More information is needed to decide.
There is enough information to suggest good precision. Analysis Flaws Analysis includes questions of inference or statistical significance, estimation or the strength of the relationship, and adjustment or taking into account potential confounding variables. Confounding variables are differences between the study and control groups that affect the outcome being assessed. There were too many variables evaluated one at a time. Statistical significance tests were correctly performed to differentiate among the variables.