Social & Preventive Medicine In a coho study, to study association between factor and disease, the risk ratio was calculated to be equal to 1. What does this signifies? A There is no association present between the factor and the disease B There is positive association between the factor and the disease C There is negative association between the factor and the disease D Data insufficient to comment 💡 Explanation In a coho study, to study association between factor and disease, the risk ratio was calculated to be equal to 1. What does this signifies? ✓ Correct Answer: A. There is no association present between the factor and the disease