Random-effects linear regression analysis of the association between birthweight z-scores and BMI z-scores at age 5, 12 months and 7 years by household income group at birth, the DNBC 1996–2010, n=85 062
| †Socioeconomic characteristics | Boys birth | Boys 5 months | Boys 12 months | Boys 7 years | Girls birth | Girls 5 months | Girls 12 months | Girls 7 years |
|---|---|---|---|---|---|---|---|---|
| Household income quintiles | ||||||||
| <20 | 0.085 (0.055 to 0.115) | 0.059 (0.019 to 0.098) | 0.019 (−0.022 to 0.059) | 0.160 (0.119 to 0.201) | 0.086 (0.056 to 0.117) | 0.014 (−0.026 to 0.054) | 0.001 (−0.034 to 0.048) | 0.126 (0.083 to 0.168) |
| 20 to <40 | 0.123 (0.094 to 0.153) | 0.067 (0.030 to 0.104) | 0.036 (−0.003 to 0.074) | 0.159 (0.119 to 0.198) | 0.134 (0.103 to 0.164) | 0.001 (−0.037 to 0.039) | 0.009 (−0.030 to 0.048) | 0.154 (0.114 to 0.195) |
| 40 to <60 | 0.091 (0.062 to 0.121) | 0.045 (0.008 to 0.082) | 0.014 (−0.024 to 0.052) | 0.103 (0.064 to 0.141) | 0.074 (0.044 to 0.104) | 0.040 (0.002 to 0.078) | 0.025 (−0.014 to 0.063) | 0.096 (0.056 to 0.136) |
| 60 to <80 | 0.045 (0.016 to 0.075) | 0.031 (−0.006 to 0.068) | −0.009 (−0.047 to 0.029) | 0.085 (0.047 to 0.124) | 0.048 (0.018 to 0.078) | 0.011 (−0.026 to 0.049) | −0.013 (−0.052 to 0.026) | 0.043 (0.003 to 0.083) |
| >80/ref | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Test for trend* | p<0.0001 | p=0.004 | p=0.19 | p<0.0001 | p<0.0001 | p=0.23 | p=0.44 | p<0.0001 |
*Test for trend across household income categories.
The estimates represent birth weight for gestational age z-scores, BMI z-scores and 95% CIs.
BMI, body mass index; DNBC, Danish National Birth Cohort.