| Model | Number of parameters | Log‐likelihood | AIC | BMD10 a | BMDL10 a | BMDU10 a | Converged | Accepted AIC |
|---|---|---|---|---|---|---|---|---|
| Null | 1 | −119.66 | 241.32 | NA | NA | NA | Yes | |
| Full | 6 | −38.90 | 89.80 | NA | NA | NA | Yes | |
| Logistic | 2 | −40.32 | 84.64 | 362.77 | 298.90 | 430.74 | Yes | Yes |
| Probit | 2 | −39.63 | 83.26 | 327.91 | 270.55 | 385.59 | Yes | Yes |
| Log‐logistic | 3 | −38.95 | 83.90 | 278.32 | 216.29 | 345.24 | Yes | Yes |
| Log‐probit | 3 | −38.90 | 83.80 | 269.90 | 215.09 | 323.21 | Yes | Yes |
| Weibull | 3 | −39.00 | 84.00 | 290.30 | 218.19 | 366.26 | Yes | Yes |
| Gamma | 3 | −38.92 | 83.84 | 277.13 | 215.62 | 336.89 | Yes | Yes |
| Two‐stage | 3 | −41.12 | 88.24 | 207.97 | 182.26 | 239.53 | No | No |
AIC: Akaike information criterion; BMD: benchmark dose; BMDL: benchmark dose lower confidence limit; BMDU: benchmark dose upper confidence limit.
a
results expressed as μg/kg bw per day.