Final answer:
The result is not statistically significant if the confidence interval for an estimate of risk includes the integer 1, as it indicates a possibility of no difference in risk.
Step-by-step explanation:
If the confidence interval for an estimate of risk (odds ratio, relative risk) contains the integer 1, then the result is Not statistically significant. This is because a confidence interval that contains 1 implies that it is possible that there is no difference between groups or that the effect is null. For instance, in epidemiology and public health, an odds ratio or relative risk of 1 indicates that there is no difference in risk, as the incidence of the outcome is approximately equal in both groups. It is important to clarify that a not statistically significant result does not necessarily mean precise or that the estimate is exact. Precision relates to the width of the confidence interval: narrower intervals suggest greater precision. Exactness would imply that the point estimate is the true value, which is never guaranteed in confidence intervals.