Table 2. Biometric models for mannan-binding lectin (MBL) and surfactant protein-D (SP-D).

		Model fit index
	Model	x2	d.f.	P	AIC
MBL	AE	3·73	2	0·16	−0·27
	DE*	0·14	2	0·93	−3·83
	ADE	0·14	1	0·71	−1·86
	ACE	3·73	1	0·05	1·73
	CE	44·81	2	0	40·81
	E	61·9	3	0	55·9
SP-D	AE*	4·38	2	0·11	0·38
	DE	11·73	2	0	7·73
	ADE	4·38	1	0·04	2·38
	ACE	2·13	1	0·14	0·13
	CE	15·66	2	0	11·66
	E	60·08	3	0	54·08

^*Best fitting model, Akaike Information Criterion (AIC = χ² − 2 × d.f.).