1. 27 / 2390 = 0.011

2. 77 / 1908 = 0.04

3. 27 / 482 / 455 / 482 = 0.059

4.  OR = 27 *  1831 / 77 * 455 = 1.41   RR = 27 / 482 / 77 / 1908 =  1.38     "Women using OC have 41% more odds to have bacteriuria" , "Bacteriuria is present in 38% more women using OC than women not using"

5. AR = 27 / 482 - 77 / 1908 = 0.015 / 0.056 = 0.27  ARP = 0.27 * 100 = 27%  "27% of bacteriuria could be attributable to OC use"

6. PAR = ((104 ÷ 2390) − (77 ÷ 1908)) ÷ (104 ÷ 2390) = 0.073  PAR% = 0.073 * 100 = 7.3%