Table 5.
Multivariate quantile regression analysis of the association between dietary diversity (DD) and maternal characteristics and child height-for-age Z-score (6–23 months), Nigeria, 2013
| Quantile regression | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ordinary least squares regression | 5th quantile | 10th quantile | 25th quantile | 50th quantile | 75th quantile | 90th quantile | ||||||||
| Variable | Estimate | se | Estimate | se | Estimate | se | Estimate | se | Estimate | se | Estimate | se | Estimate | se |
| Child characteristics | ||||||||||||||
| DD score | −0·029* | 0·013 | −0·007 | 0·027 | −0·026 | 0·022 | −0·005 | 0·016 | −0·031* | 0·015 | −0·046* | 0·018 | −0·029 | 0·027 |
| Child’s sex (female) | 0·325*** | 0·045 | 0·397*** | 0·091 | 0·400*** | 0·074 | 0·427*** | 0·053 | 0·297*** | 0·050 | 0·339*** | 0·060 | 0·282** | 0·088 |
| Maternal characteristics | ||||||||||||||
| Mother’s education (years) | 0·059*** | 0·006 | 0·068*** | 0·012 | 0·069*** | 0·009 | 0·076*** | 0·007 | 0·061*** | 0·006 | 0·053*** | 0·008 | 0·031** | 0·011 |
| Mother’s age (years) | 0·011*** | 0·005 | 0·025* | 0·011 | 0·023** | 0·009 | 0·016* | 0·006 | 0·024*** | 0·006 | 0·018* | 0·007 | 0·007 | 0·011 |
| Mother’s parity | −0·058*** | 0·015 | −0·077* | 0·031 | −0·070** | 0·025 | −0·059** | 0·018 | −0·081*** | 0·017 | −0·047* | 0·021 | −0·013 | 0·030 |
| Mother working (yes) | 0·097 | 0·049 | 0·233* | 0·101 | 0·108 | 0·082 | 0·149* | 0·059 | 0·106 | 0·056 | −0·044 | 0·067 | 0·058 | 0·098 |
| Mother’s BMI (kg/m2) | 0·024*** | 0·006 | 0·024* | 0·012 | 0·028** | 0·010 | 0·019** | 0·007 | 0·022*** | 0·007 | 0·026** | 0·008 | 0·029* | 0·012 |
| Mother’s height (cm) | 0·447*** | 0·037 | 0·388*** | 0·076 | 0·504*** | 0·062 | 0·491*** | 0·044 | 0·491*** | 0·042 | 0·440*** | 0·050 | 0·447*** | 0·073 |
| Household characteristics | ||||||||||||||
| Household wealth index category | ||||||||||||||
| Poorest (reference) | ||||||||||||||
| Wealth index (poor) | 0·230*** | 0·069 | 0·207 | 0·141 | 0·221 | 0·114 | 0·183* | 0·082 | 0·267*** | 0·078 | 0·253** | 0·093 | 0·302* | 0·137 |
| Wealth index (middle) | 0·400*** | 0·075 | 0·481** | 0·153 | 0·499*** | 0·124 | 0·408*** | 0·089 | 0·451*** | 0·084 | 0·419*** | 0·101 | 0·228 | 0·148 |
| Wealth index (rich) | 0·523*** | 0·082 | 0·635*** | 0·166 | 0·681*** | 0·135 | 0·675*** | 0·097 | 0·521*** | 0·092 | 0·428*** | 0·110 | 0·511** | 0·161 |
| Wealth index (richest) | 0·532*** | 0·097 | 0·533** | 0·197 | 0·798*** | 0·160 | 0·634*** | 0·115 | 0·505*** | 0·109 | 0·463*** | 0·130 | 0·521** | 0·191 |
| Household size | −0·011 | 0·007 | −0·016 | 0·014 | −0·019 | 0·012 | −0·006 | 0·008 | −0·011 | 0·008 | −0·004 | 0·010 | −0·012 | 0·014 |
| Observations (n) | 7657 | 7657 | 7657 | 7657 | 7657 | 7657 | 7657 | |||||||
*P<0·05, **P<0·01, ***P<0·001.