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Data modification for study i with zero events (i.e., either yi1 or yi2 is zero) using a constant 0.5
| No. of events | No. of nonevents | Total | |
|---|---|---|---|
| Control group | yi1 + 0.5 | ni1 − yi1 + 0.5 | ni1 + 1 |
| Treated group | yi2 + 0.5 | ni2 − yi2 + 0.5 | ni2 + 1 |
| Total | yi· + 1 | ni· − yi· + 1 | ni· + 2 |
