Table 1.
Evaluation of quality of height, weight, mid-upper arm circumference and age using missing values and digit preference, scores overall and by age group
| Indicator | Monica DP (median) | % Missing (survey level mean) | % Missing (overall dataset) | |
|---|---|---|---|---|
| Weight | Children 6–59 m | 5 | 0.6% | 0.6% |
| Children 6–23 m | 8 | 0.6% | 0.6% | |
| Children 24–59 m | 6 | 0.6% | 0.6% | |
| Differencea | 2*** | – | – | |
| Correlationb | 0.4*** | – | – | |
| % youngerc better | 13.6% | – | – | |
| % olderc better | 71.5% | – | – | |
| Height | Children 6–59 m | 8 | 0.5% | 0.5% |
| Children 6–23 m | 10 | 0.5% | 0.5% | |
| Children 24–59 m | 8 | 0.5% | 0.5% | |
| Differencea | 2*** | – | – | |
| Correlationb | 0.6*** | – | – | |
| % youngerc better | 19.1% | – | – | |
| % olderc better | 69.2% | – | – | |
| MUAC | Children 6–59 m | 6 | 0.5% | 0.5% |
| Children 6–23 m | 9 | 0.6% | 0.7% | |
| Children 24–59 m | 7 | 0.5% | 0.4% | |
| Differencea | 2*** | – | – | |
| Correlationb | 0.6*** | – | – | |
| % youngerc better | 16.4% | – | – | |
| % olderc better | 70.8% | – | – | |
| Age Category | Children 6–59 m | 7 | 37.3% | 39.2% |
| Children 6–23 m | 8 | 32.6% | 34.1% | |
| Children 24–59 m | 9 | 39.9% | 42.1% | |
| Differencea | −1*** | – | – | |
| Correlationb | 0.3*** | – | – | |
| % youngerc better | 51.0% | – | – | |
| % olderc better | 40.7% | – | – | |
| With birthdays | 7 | – | – | |
| Without birthdays | 16 | – | – | |
| Differenced | −10*** | – | – |
DP Digit preference; MUAC Mid-upper arm circumference; SD Standard deviation
% missing MUAC excluded surveys excluded from MUAC analysis
% missing for age category is % missing birthday/exact DOB
P-values were calculated using non-parametric tests
*p < 0.05; **p < 0.01; ***p < 0.001
a Difference between 6–23 and 24–59 months age groups
bCorrelation between 6–23 and 24–59 age groups
c ‘Younger better’ refers to the percentage of surveys where absolute values for age group 6–23 months were lower that absolute values for age group 24–59 months. ‘Older better’ refers to the percentage of surveys where absolute values for age group 6–23 months were greater that absolute values for age group 24–59 months. Surveys in which the values in the two age groups were equivalent not included in either figure
dDifference between sub-set of children with exact date of birth and children for whom age was estimated to the nearest month