Key points are not available for this paper at this time.
Cyrus R. Mehta, Stephen J. Walsh, Comparison of Exact, Mid-p, and Mantel-Haenszel Confidence Intervals for the Common Odds Ratio across Several 2 × 2 Contingency Tables, The American Statistician, Vol. 46, No. 2 (May, 1992), pp. 146-150
Mehta et al. (Fri,) studied this question.