Table 3.

GWPR Model III and non-stationarity test results (N=3,071)

Variables	Min	Q1	Median	Q3	Max	Global S.E.	Status†
Intercept	−1.302	−0.974	−0.781	−0.708	−0.583	0.068	Non-Stationary
Low birth weight rate	0.006	0.007	0.007	0.008	0.011	0.001	Stationary
Marriage postponement	−0.005	−0.001	0.000	0.002	0.004	0.001	Non-Stationary
Cohabitation	−0.012	−0.004	0.007	0.020	0.035	0.008	Non-Stationary
Divorce	−0.002	0.008	0.015	0.019	0.030	0.005	Non-Stationary
% Non-Hispanic Black	0.002	0.003	0.005	0.006	0.011	0.001	Non-Stationary
% Hispanic	−0.008	−0.005	−0.004	−0.003	−0.001	0.001	Stationary
% Other races	−0.009	−0.003	0.002	0.004	0.008	0.001	Non-Stationary
Affluence	−0.085	−0.067	−0.056	−0.044	−0.030	0.011	Non-Stationary
Disadvantage	−0.042	−0.025	−0.015	−0.004	0.051	0.013	Stationary
Stability	−0.050	−0.031	−0.022	−0.013	0.007	0.008	Non-Stationary
Late or no prenatal care	0.000	0.002	0.005	0.007	0.010	0.001	Non-Stationary

^†For an independent variable, when the interquartile range (Q3-Q1) of the local estimates is at least twice greater than the standard error of the global estimate (Global S.E.), the non-staionarity is found.