RA Positive Negative Sum Age groups Number percent Number percent Number percent Aug-34 74 68.5 34 31.5 107 100 35-44 67 69 30 31 97 100 45-54 77 62.6 46 37.4 123 100 55-74 48 65.7 25 34.3 73 100 sum 266 66.5 135 33.5 400 100

Table 2: Demographic information according to age.