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Calculation of the net benefits
| Before intervention | After intervention | Difference based on time | |
|---|---|---|---|
| Intervention group | β0+β1+ε (I=1, T=0) |
β0+β1+β2+β3+ε (I=1, T=1) |
Δγt1=β2+β3 |
| Usual-care group | β0+ε (I=0, T=0) |
β0+β2+β3+ε (I=0, T=1) |
Δγt2=β2 |
| Difference based on group | Δγi1=β1 | Δγi2=β1+β3 | ΔΔγ=β3 |
