S/N	Model	Model Parameters	Goodness of Fit	Remark
1	y = ao+ a1x1 + a2x2 + a3x3 + a4x4 where x1 = maternal age x2 = maternal weight x3 = mother BMI x4 = gestation weight gain	ao = 291.06 a1= -6.48 a2 = 21.63 a3 = 26.63 a4 = -17.36	R2 = 0.191 Adj. R2 = 0.132 MSE = 747820 RMSE = 864.76	Bad
2	y = ao+ a1x1 + a2x2 + a3x3 where x1 = gestation age at delivery x2 = gestation weight gain x3 = Aluminium	ao = -1526.14 a1= 128.74 a2 = 1.88 a3 = -21193.42	R2 = 0.622 Adj. R2 = 0.602 MSE = 343380 RMSE = 585.98	Fair
3	y = ao+ a1x1 + a2x2 + a3x3 where x1 = maternal age x2 = maternal height x3 = Manganese	ao= -163.28 a1= 11.99 a2= 1260.33 a3= 3306.14	R2 = 0.0187 Adj. R2 = -0.03 MSE = 890974 RMSE = 943.92	Bad
4	y = ao+ a1x1 + a2x2 + a3x3 where x1 = maternal weight x2= gestation age at delivery x3 = Aluminium	a0 = -3068.68 a1= 19.03 a2 = 127.60 a3= -17484.1	R2 = 0.686 Adj. R2 = 0.670 MSE = 284917 RMSE = 533.78	Good
5	y = a0x1a1x2a2x3a3 where x1 = maternal weight x2 = gestation age at delivery x3 = Aluminium	a0 = 0.105 a1= 0.499 a2 = 2.0383 a3 = -0.158	R2 = 0.645 MSE = 297419 RMSE = 545.36	Fair
6	y = a0+ a1x1 + a2x2 + a3x3 outliers were removed where x1 = gestation age at delivery x2 = Aluminium x3= maternal weight	a0= -1978.77 a1= 127.72 a2 = -18508.15 a3 = 5.565	R2 = 0.742 Adj. R2 = 0.727 MSE = 199692 RMSE = 446.87	Good
7	y = a0+ a1x1 + a2x2 + a3x3 + a4x4 where x1 = maternal weight x2 = gestation age at delivery x3 = Aluminium x4 = adequate sleep	a0 = -3470.95 a1 = 19.625 a2 = 126.47 a3 = -11165.64 a4 = 397.91	R2 = 0.728 Adj. R2 = 0.708 MSE = 251692 RMSE = 501.69	Good
8	y = a0+ a1x1 + a2x2 + a3x3 + a4x4 where x1 = gestation age at delivery x2 = Aluminium x3 = maternal weight x4 = adequate sleep where x4 equal; 1 = No and 0 = Yes	a0 = -2427 a1 = 127.90 a2 = -13580 a3 = 7.678 a4 = 250.05	R2 = 0.7601 Adj. R2 = 0.742 MSE = 188861 RMSE = 438.58	Good
9	y = a0+ a1x1 + a2x2 + a3x3 + a4x4 + a5x2x3 where x1 = gestation age at delivery x2 = Aluminium x3 = maternal weight x4 = adequate sleep where x4 equal; 1 = No and 0 = Yes	a0 = -300.91 a1 = -21.614 a2 = 129.81 a3 = -89479.99 a4 = 289.03 a5 = 1013.97	R2 = 0.775 Adj. R2 = 0.753 MSE = 180311 RMSE = 424.87	Good (Best)