Model	Number of parameters	Log‐likelihood	AIC	BMD30 a	BMDL30 a	BMDU30 a	Converged	Accepted AIC
Null	1	−57.71	117.42	NA	NA	NA	Yes
Full	4	−43.95	95.90	NA	NA	NA	Yes
Logistic	2	−48.17	100.34	880.86	711.16	1,166.91	Yes	No
Probit	2	−47.86	99.72	857.49	698.66	1,153.10	Yes	No
Log‐logistic	3	−44.25	94.50	470.78	158.26	705.30	Yes	Yes
Log‐probit	3	−44.23	94.46	470.49	162.65	695.34	Yes	Yes
Weibull	3	−44.34	94.68	469.42	133.92	726.08	Yes	Yes
Gamma	3	−44.36	94.72	473.39	119.38	727.37	Yes	Yes
Two‐stage	3	−44.50	95.00	534.05	396.43	741.21	Yes	Yes

AIC: Akaike information criterion; BMD: benchmark dose; BMDL: benchmark dose lower confidence limit; BMDU: benchmark dose upper confidence limit.

^aResults expressed as μg/kg bw per day.