Table A1.

Distribution of response variable and link functions.

Dependent variable distribution family	Link function
Normal distribution	Identity link: g(Z) = Z
Binomial distribution	Logit link: g(Z) = log Z/(1-Z)
Negative binomial distribution	Inverse link: g(Z) = 1/Z
Gamma distributions	Log link: g(Z) = log(Z)
Poisson distributions	Log link: g(Z) = log(Z)