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Table 3 Multivariate regression analyses of the association between environmental factors and NTDs as the dependent variable

From: Identifying environmental risk factors for human neural tube defects before and after folic acid supplementation

Model (R2) and Independent Variables Standardized Coefficients t P Std. Error
Rates for the 1998-2001 period in the buffer region of 7-12 km (0.415)
doctor 0.511 3.683 0.001 7.096
Rates for the 2002-2005 period in the buffer region of 7-12 km (0.242)
fruit -0.479 -2.298 0.028 15.020
pollution 0.380 2.337 0.026 0.003
Distance to faults -0.531 -2.617 0.013 0.003
Rates for the 1998-2001 period in the buffer region of 13-18 km (0.191)
elevation 0.437 2.380 0.026 0.146
Rates for the 2002-2005 period in the buffer region of 13-18 km (0.711)
doctor -0.717 -5.848 0.000 8.693
distance to roads 0.440 3.640 0.002 0.004
distance to rivers -0.323 -2.618 0.016 0.002
Rates for the 1998-2001 period in the buffer region of 25-30 km (0.486)
fertilizer 0.540 3.177 0.005 0.640
elevation 0.392 2.308 0.033 0.153
Rates for the 2002-2005 period in the buffer region of 25-30 km (0.362)
gradient 0.602 3.283 0.004 1.836