Table 6.

Values of F-statistics for each measure, proportional to the F-statistic obtained when using the area under the curve method (1.00)

	Birthweight-for- gestational-age z-value (N = 2016)	Birthweight (N = 2016)	Six-months weight retention (N = 1180)	One-year weight retention (N = 1055)	Two-years weight retention (N = 865)	Three-years weight retention (N = 663)
GWG +G
AUC (ref)	1.00	1.00	1.00	1.00	1.00	1.00
AUC 98	1.04	1.01	0.28	0.33	0.09	0.10
Linear	1.15	1.04	0.79	0.75	0.45	0.45
Linear 98	0.98	1.00	0.43	0.40	0.17	0.12
Difference	1.16	1.04	1.07	0.93	0.71	0.68
Difference 98	1.11	1.02	0.46	0.41	0.17	0.15
GWG +CG
AUC (ref)	1.00	1.00	1.00	1.00	1.00	1.00
AUC 98	1.02	1.01	0.37	0.59	0.45	0.53
Linear	1.08	1.05	0.85	0.85	0.65	0.69
Linear 98	1.02	1.01	0.51	0.63	0.49	0.54
Difference	1.08	1.04	1.09	0.97	0.82	0.82
Difference 98	1.05	1.03	0.52	0.64	0.49	0.56
IOM	0.99	1.00	0.64	0.58	0.53	0.78

GWG, gestational weight gain measured by one of the four methods: ‘Difference’, ‘Linear’, ‘IOM’, or ‘AUC’; G, Gestational age; C, additional covariates: infant sex and mother’s age, pre-pregnancy BMI, height, race/ethnicity, education and smoking behavior during pregnancy.

Methods labelled ‘98’ used data only from the 98th day forward; others used data from the entire pregnancy.