0.5 added to each cell in trials where any cell is zero to calculate or, logor, selogor, varlogor.
'Trial' column in Table 1 of Thompson & Sharp, Stat Med 1999; 18:2693-2708
Angina or previous non-fatal infarction (BMJ 1994 p368)
'Trial' column in Table 2 of Thompson, Stat Methods Med Res 1993; 2:173-192
Order in Table IV of Law, Wald & Thompson, BMJ 1994; 308:376-372
Data from Thompson & Sharp Stat Med 1999; 18:2693-2708
First published in Law, M.R. Wald & Thompson BMJ 1994; 308:367-372
25 / 28 trials also in Thompson, Stat Methods Med Res 1993; 2:173-192