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Table 4 Estimation results of Eq. (1)

From: Non-linear association of low birthweight with risk factors including women’s BMI: evidence from an international comparison

VARIABLES

(1)

(2)

(3)

(4)

BMI

-5.299***

-5.909***

 

-48.13***

 

(1.745)

(1.853)

 

(14.87)

BMI2

0.0919***

0.102***

 

1.795***

 

(0.0320)

(0.0341)

 

(0.576)

BMI3

   

-0.0224***

    

(0.00742)

lnGDP

-2.311

 

-4.734**

-2.442

 

(1.762)

 

(1.998)

(7.990)

lnGDP2

0.111

 

0.235**

0.148

 

(0.0960)

 

(0.107)

(0.892)

lnGDP3

   

-0.00221

    

(0.0331)

EMPLOYEE

0.0820*

0.0860**

0.0914**

0.0922**

 

(0.0431)

(0.0426)

(0.0407)

(0.0376)

EMPLOYEE2

-0.00130**

-0.00132**

-0.00130**

-0.00127***

 

(0.000566)

(0.000573)

(0.000500)

(0.000452)

WEAK_LABOR

-0.00678

-0.00828

-0.0167

0.0156

 

(0.0255)

(0.0243)

(0.0260)

(0.0242)

WEAK_LABOR2

0.000269

0.000337

0.000482

0.000131

 

(0.000364)

(0.000341)

(0.000361)

(0.000319)

BIRHT_STAFF

-0.0523**

-0.0534**

-0.0863**

-0.0211

 

(0.0211)

(0.0214)

(0.0355)

(0.0193)

BIRTH_STAFF2

0.000350**

0.000336**

0.000537**

0.000136

 

(0.000163)

(0.000159)

(0.000264)

(0.000143)

YOUNG_MOTHER

0.2785***

0.2288***

0.3318***

0.2235***

 

(0.0735)

(0.0720)

(0.0729)

(0.0706)

D_year2000

-0.771***

-0.671***

-0.386**

-0.740***

 

(0.242)

(0.208)

(0.186)

(0.231)

D_year2001

-0.725***

-0.618***

-0.411**

-0.694***

 

(0.210)

(0.181)

(0.159)

(0.202)

D_year2002

-0.661***

-0.561***

-0.399***

-0.643***

 

(0.200)

(0.170)

(0.151)

(0.190)

D_year2003

-0.639***

-0.554***

-0.386**

-0.619***

 

(0.188)

(0.162)

(0.149)

(0.180)

D_year2004

-0.536***

-0.466***

-0.337***

-0.520***

 

(0.168)

(0.145)

(0.128)

(0.159)

D_year2005

-0.513***

-0.462***

-0.342***

-0.495***

 

(0.155)

(0.137)

(0.120)

(0.149)

D_year2006

-0.434***

-0.394***

-0.274***

-0.427***

 

(0.135)

(0.120)

(0.102)

(0.132)

D_year2007

-0.357***

-0.330***

-0.231**

-0.354***

 

(0.120)

(0.109)

(0.0886)

(0.119)

D_year2008

-0.322***

-0.299***

-0.214***

-0.321***

 

(0.108)

(0.0998)

(0.0792)

(0.107)

D_year2009

-0.290***

-0.263***

-0.209***

-0.295***

 

(0.104)

(0.0912)

(0.0795)

(0.101)

D_year2010

-0.251***

-0.234***

-0.196***

-0.246***

 

(0.0901)

(0.0827)

(0.0710)

(0.0883)

D_year2011

-0.202***

-0.196***

-0.157***

-0.189**

 

(0.0743)

(0.0725)

(0.0589)

(0.0737)

D_year2012

-0.125**

-0.121**

-0.0991**

-0.132**

 

(0.0614)

(0.0611)

(0.0496)

(0.0613)

D_year2013

-0.114**

-0.117**

-0.116**

-0.120**

 

(0.0456)

(0.0466)

(0.0465)

(0.0477)

D_year2014

-0.0490

-0.0488

-0.0767*

-0.0401

 

(0.0359)

(0.0355)

(0.0416)

(0.0374)

Constant

94.94***

92.38***

32.62***

450.2***

 

(25.43)

(25.40)

(9.990)

(123.0)

Observations

1,388

1,423

1,394

1,388

R-squared

0.467

0.453

0.387

0.528

Number of countries

133

136

134

133

  1. R_LBW is the dependent variable. The estimation method used was a fixed effects model. YEAR dummies are included in the estimation but are not shown here to save space. Robust standard errors are indicated in parentheses. All analyses were conducted using Stata, and standard errors were clustered at the country level to account for within-country correlation over time. *** p < 0.01, ** p < 0.05, * p < 0.1