Table 2.
Multivariate quantile regression analysis of the association between dietary diversity (DD) and maternal characteristics and child height-for-age Z-score, Ghana, 2014
| 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 | −0·009 | 0·020 | −0·066 | 0·056 | 0·024 | 0·036 | 0·008 | 0·029 | −0·005 | 0·022 | −0·020 | 0·024 | 0·016 | 0·031 |
| Child’s sex (female) | 0·137* | 0·064 | 0·099 | 0·180 | −0·025 | 0·113 | 0·108 | 0·092 | 0·170* | 0·070 | 0·112 | 0·076 | 0·099 | 0·099 |
| Child’s age (months) | −0·015*** | 0·002 | −0·022*** | 0·006 | −0·014*** | 0·004 | −0·010** | 0·003 | −0·011*** | 0·002 | −0·016*** | 0·002 | −0·022*** | 0·003 |
| Maternal characteristics | ||||||||||||||
| Mother’s education (years) | 0·029*** | 0·009 | 0·061* | 0·024 | 0·056*** | 0·015 | 0·056*** | 0·012 | 0·018 | 0·009 | 0·016 | 0·010 | 0·034* | 0·013 |
| Mother’s age (years) | 0·023** | 0·007 | 0·005 | 0·021 | 0·005 | 0·013 | 0·024* | 0·011 | 0·037*** | 0·008 | 0·027** | 0·009 | 0·022 | 0·012 |
| Mother’s parity | −0·078** | 0·026 | −0·032 | 0·072 | −0·028 | 0·045 | −0·068 | 0·037 | −0·127*** | 0·028 | −0·110*** | 0·030 | −0·077 | 0·039 |
| Mother working (yes) | −0·097 | 0·079 | −0·068 | 0·222 | 0·002 | 0·140 | −0·087 | 0·113 | −0·108 | 0·087 | −0·064 | 0·094 | −0·192 | 0·122 |
| Mother’s BMI (kg/m2) | 0·054*** | 0·008 | 0·060** | 0·022 | 0·064*** | 0·014 | 0·056*** | 0·012 | 0·042*** | 0·009 | 0·053*** | 0·009 | 0·068*** | 0·012 |
| Mother’s height (cm) | 0·423*** | 0·053 | 0·409** | 0·150 | 0·356*** | 0·095 | 0·465*** | 0·077 | 0·523*** | 0·059 | 0·431*** | 0·063 | 0·369*** | 0·082 |
| Household characteristics | ||||||||||||||
| Household wealth index category | ||||||||||||||
| Poorest (reference) | ||||||||||||||
| Wealth index (poor) | −0·131 | 0·093 | −0·242 | 0·261 | −0·433** | 0·164 | −0·279* | 0·133 | −0·130 | 0·103 | −0·034 | 0·110 | 0·136 | 0·143 |
| Wealth index (middle) | −0·113 | 0·103 | 0·026 | 0·291 | −0·271 | 0·183 | −0·292* | 0·149 | −0·041 | 0·114 | −0·101 | 0·123 | −0·110 | 0·160 |
| Wealth index (rich) | −0·027 | 0·120 | −0·021 | 0·337 | −0·239 | 0·212 | −0·239 | 0·172 | −0·039 | 0·133 | 0·062 | 0·142 | 0·103 | 0·185 |
| Wealth index (richest) | 0·073 | 0·145 | 0·173 | 0·407 | −0·193 | 0·256 | −0·180 | 0·208 | 0·142 | 0·160 | 0·193 | 0·172 | 0·032 | 0·224 |
| Household size | −0·008 | 0·013 | 0·030 | 0·036 | −0·008 | 0·023 | −0·006 | 0·019 | −0·001 | 0·014 | −0·009 | 0·015 | −0·004 | 0·020 |
| Observations (n) | 1388 | 1388 | 1388 | 1388 | 1388 | 1388 | 1388 | |||||||
*P<0·05, **P<0·01, ***P<0·001.