Model Marginal effect Standard error P-value Point estimate
Logit1 -0.0003682 0.00 0.000 454.67
  -0.0003249 0.00 0.000 625.17
Logit2 -0.0008504 0.00 0.002 454.67
  -0.0006838 0.00 0.000 625.17
Probit1 -0.0003729 0.00 0.000 454.67
  -0.0003371 0.00 0.000 625.17
Probit2 -0.0008016 0.00 0.001 454.67
  -0.0006834 0.00 0.000 625.17
Table 2: Marginal effects of probit and logit models on CD4 T lymphocyte values in HIV-positive patients.