Table 3

Mean Differences Between Sibling Pairs with Divergent Health Measures

Number of Sibling pairs with differenceDifference in on SADifference in grade 12 by 17Difference in College MathDifference in Literacy
Major conditions
    Ages 0–3  6,1030.011**
[0.004]		− 0.005
[0.006]		− 0.012**
[0.006]		− 0.021*
[0.012]
    Ages 4–8  5,9860.014**
[0.004]		− 0.020**
[0.006]		− 0.015**
[0.006]		− 0.035**
[0.012]
    Ages 9–13  6,1470.011**
[0.004]		− 0.019**
[0.006]		− 0.009
[0.006]		− 0.038**
[0.012]
    Ages 14–18  8,1030.035**
[0.003]		− 0.020**
[0.005]		− 0.023**
[0.005]		− 0.029**
[0.011]
ADHD/conduct disorder
    Ages 0–3  1,4380.011
[0.008]		− 0.052**
[0.013]		− 0.018
[0.012]		− 0.084**
[0.026]
    Ages 4–8  1,6190.029**
[.009]		− 0.144**
[0.013]		− 0.062**
[0.011]		− 0.322**
[0.025]
    Ages 9–13  1,6500.038**
[0.008]		− 0.208**
[0.013]		− 0.094**
[0.010]		− 0.463**
[0.024]
    Ages 14–18  1,3320.070**
[0.011]		− 0.215**
[0.015]		− 0.117**
[0.011]		− 0.468**
[0.026]
Asthma
    Ages 0–3  3,177− 0.010**
[0.005]		− 0.016**
[0.008]		0.005
[0.008]		− 0.088**
[0.017]
    Ages 4–8  4,4270.000
[0.004]		− 0.004
[0.007]		0.003
[0.007]		− 0.041**
[0.015]
    Ages 9–13  5,217− 0.005
[0.004]		− 0.004
[0.006]		− 0.015**
[0.007]		− 0.028**
[0.014]
    Ages 14–18  4,6750.010**
[0.004]		− 0.01
[0.007]		− 0.018**
[0.007]		− 0.017
[0.014]
Major injury
    Ages 0–310,7890.002
[0.002]		− 0.016**
[0.004]		− 0.005
[0.004]		− 0.041**
[0.010]
    Ages 4–810,928− 0.003
[0.003]		− 0.016**
[0.004]		− 0.006
[0.004]		− 0.045**
[0.009]
    Ages 9–1310798− 0.001
[0.003]		− 0.025**
[0.004]		− 0.021**
[0.004]		− 0.077**
[0.009]
    Ages 14–1811,0550.004
[0.003]		− 0.033**
[0.004]		− 0.026**
[0.004]		− 0.082**
[0.009]
Congenital anomalies and perinatal problem
    Ages 0–3  5,8680.004
[0.004]		− 0.009
[0.006]		− 0.014**
[0.006]		− 0.031**
[0.012]
    Ages 4–8    7550.033**
[0.011]		− 0.058**
[0.016]		− 0.01
[0.016]		− 0.091**
[0.033]
    Ages 9–13    5850.042**
[0.012]		− 0.045**
[0.019]		0.003
[0.018]		− 0.113**
[0.040]
    Ages 14–18    6060.033**
[0.013]		− 0.032*
[0.018]		− 0.01
[0.017]		− 0.093**
[0.039]
Mean of outcome0.0550.6910.214− 0.014

  • ↵Notes: Standard Errors in brackets. Column 1 reports the number of sibling pairs with differences in health measures at each age. The remaining columns report the average difference in outcomes for the pairs where there is a difference in the specified health condition. * denotes statistical significance at the 10 percent level. ** denotes significance at the 5 percent level.