Table 1. Prediction model with paraquat concentrations and time interval.

		Model 1	Model 2	Model 3
Overall performance	R2	0.846	0.833	0.811
	Brier	0.050	0.056	0.065
	Brierscaled	0.784	0.763	0.735
Discrimination	c statistic	0.981	0.977	0.970
	[95% CI]	[0.975–0.986]	[0.972–0.983]	[0.964–0.976]

Model 1: patients who were admitted to our hospital within 12 h after ingestion of paraquat.

Model 2: patients who were admitted to our hospital within 24 h after ingestion of paraquat.

Model 3: all patients who were admitted our hospital at any time after ingestion of paraquat.