ref:: [1]Sensitivity Analysis in Observational Research: Introducing the E-Value
### compute E-values for OR = 0.86 with CI: [0.75, 0.99]
print('E-value with CI: ', cal_E_values(rr=0.86, lower=0.75, upper=0.99, whichr='or', ifrare=False) )
>> E-value with CI: 1.369(1.076-1.577)