Table 3. Parameter estimates from segregation analysis of oxygen saturation levels.

	General model		Environmental		Mixed Mendelian
Parameters	Parameter estimate	SE	Parameter estimate	SE	Parameter estimate	SE
qA	0.2226	0.0261	0.1989	0.0246	0.2178	0.0240
τAA	0.8120	0.2004	0.8011	0.0246	(1)	0.0
τAB	0.4127	0.0426	0.8011	0.0246	(0.5)	0.0
τBB	0.9834	0.0189	0.8011	0.0246	(0)	0.0
μAA	79.7886	1.1102	79.4634	1.2173	79.4675	1.0869
μBB = μAB	89.3714	0.0902	89.3269	0.0875	89.3568	0.0857
σ2	9.5674	0.3798	9.8941	0.4122	9.6587	0.3722
ρFM	0.1298	0.0750	0.1248	0.0715	0.1272	0.0721
ρPO	0.1240	0.0260	0.1195	0.0250	0.1172	0.0248
ρSS	0.1947	0.0355	0.2192	0.0358	0.1937	0.0346
λ1	5.4692	0.4799	5.5930	0.5159	5.5223	0.4897
-2InL	15,260.8		15,277.1		15,268.2
Par*	11		8		8
χ2			16.3		7.4
P value			<0.0001		0.0602

Numbers in parentheses are fixed.

^*Number of functionally independent parameters estimated.