Confidence intervals are given for the relative risk of death for five specific causes of death, as follows: Circulatory (1.02 to 1.45), Cancer (0.83 to 1.37), Digestive (0.98 to 4.03), Respiratory (0.92, 3.02) and External (0.60 to 2.12). For which of these causes can it be concluded that the risk of death in the population is lower for those who attend religious services at least weekly? Explain what criterion you need to determine your answer.