Table 1

Mean Sample Characteristics by Wealth Quartile

Quartile 1Quartile 2Quartile 3Quartile 4
IChild characteristics
Age (months)  23.709    (10.446)  23.666    (10.924)  24.294    (10.130)  24.205    (9.983)
Female =1    0.511    0.469    0.552    0.440
Premature (gestational age < 37 weeks) =1    0.162    0.122    0.152    0.184
Birth weight in grams3,040.6(484.7)3,012.8(536.3)3,034.6(506.6)3,062.3(536.6)
Stunted (z-height-for-age < −2 SD) =1    0.229    0.204    0.145    0.127
Firstborn =1    0.417    0.501    0.524    0.572
IIParental characteristics
Age mother  25.302    (6.185)  26.040    (6.122)  27.565    (7.041)  28.895    (6.673)
Education years mother    8.319    (3.251)    9.865    (2.749)  10.517    (2.988)  12.448    (3.110)
Mother has more than secondary education =1    0.106    0.176    0.329    0.607
Mother works (paid or unpaid) =1    0.442    0.437    0.565    0.619
Mother gave birth before age 18 =1    0.186    0.134    0.136    0.075
Education years father    6.846    (3.321)    8.042    (3.445)    8.977    (3.545)    9.653    (4.676)
Father has more than secondary education =1    0.059    0.167    0.270    0.493
Father deceased/no longer in household =1    0.291    0.340    0.315    0.334
IIIHousehold characteristics
Household size    4.444    (1.792)    4.687    (1.638)    4.736    (1.545)    4.771    (1.340)
Grandmother lives in household =1    0.147    0.272    0.285    0.370
Crowding (people per room)a    3.053    (1.279)    1.852    (0.819)    1.388    (0.633)    1.054    (0.380)
Quality floors (tiles, carpet, wood) a =1    0.396    0.618    0.824    0.952
External windowsa =1    0.688    0.881    0.942    0.994
Shared kitchena =1    0.417    0.212    0.106    0.045
Shared bathrooma =1    0.574    0.272    0.088    0.027
More than one bathrooma =1    0.024    0.072    0.133    0.515
Cara =1    0.003    0.012    0.064    0.419
Fridgea =1    0.318    0.749    0.906    0.994
Microwavea =1    0.015    0.084    0.239    0.572
Washing machinea =1    0.117    0.475    0.794    0.961
Boilera =1    0.078    0.212    0.458    0.804
Computera =1    0.042    0.122    0.573    0.907
Smartphonea =1    0.015    0.021    0.079    0.295
Flat TVa =1    0.054    0.131    0.206    0.575
Home theatrea =1    0.009    0.057    0.091    0.235
DVDa =1    0.453    0.707    0.791    0.934
Stereoa =1    0.309    0.606    0.721    0.831
Games consolea =1    0.039    0.104    0.094    0.259
Interneta =1    0.030    0.131    0.382    0.795
Garagea =1    0.000    0.036    0.133    0.485
IVLevel home stimulation
Books and newpapers (FCI Score)    1.574    (1.768)    2.376    (1.860)    2.897    (1.960)    3.780    (1.935)
Play materials (FCI Score)    3.742    (2.105)    4.391    (2.221)    4.942    (2.229)    5.979    (2.269)
Play activities (FCI Score)    3.904    (1.710)    4.107    (1.629)    4.524    (1.745)    4.991    (1.565)
VChildcare arrangements
Childcare center attendance =1    0.267    0.313    0.324    0.340
Care minder =1    0.426    0.499    0.552    0.608
  • Notes: N = 1,330. Data are means. SD reported in parentheses for continuous variables.

  • a. Variables used to construct wealth index.