Table 6. Estimates of fertility measures for three oxygen saturation genotypes.

Variable	Mean ± SD [minimum, maximum, n]	Genotypic mean AA	Genotypic mean AB	Genotypic mean BB	Multiple regression R2	Multiple regression P to test Ho: AA = AB/BB	Permutation P to test Ho: AA = AB/BB
Number of pregnancies	4.62 ± 2.79 [1,15 n = 689]	4.59	4.90	4.77	0.96*†‡§	0.828	0.826
Number of live births	4.49 ± 2.72 [0,15, n = 685]	4.45	4.76	4.62	0.96*†‡§	0.820	0.823
Number of children now alive	4.09 ± 2.33 [0, 13, n = 664]	1.64	3.58	3.79	0.95*†¶∥**	0.046	0.039
Number of children who died	0.54 ± 0.10 [0,8, n = 664]	2.53	0.77	0.48	0.38†‡§**	0.007	0.009
Number of infant deaths	0.36 ± 0.74 [0.7 n = 681]	1.69	0.62	0.32	0.28†¶	0.011	0.014
Proportion of livebirths now alive	0.90 ± 0.17 [0,1, n = 664]	0.40	0.88	0.91	0.97**††	0.004	0.006
Proportion of livebirths that died during infancy	0.07 ± 0.15 [0,1, n = 654]	0.40	0.10	0.06	0.20**	0.015	0.023
Proportion of livebirths that died between 1 and 15 years of age	0.02 ± 0.07 [0,0.5, n = 653]	0.01	0.01	0.02	0.08††	0.763	0.755
Proportion of livebirths that died before 15 years of age	0.09 ± 0.16 [0,1, n = 653]	0.43	0.11	0.08	0.26**††	0.036	0.042

^*Age at first pregnancy.

^†Age at first birth.

^‡Age at last pregnancy.

^§Altitude.

^¶Age at last birth.

^∥Marital type.

^**Currently using family planning.

^††Maternal age.