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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

From: Comparison of anthropometric data quality in children aged 6-23 and 24-59 months: lessons from population-representative surveys from humanitarian settings

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***
  1. DP Digit preference; MUAC Mid-upper arm circumference; SD Standard deviation
  2. % missing MUAC excluded surveys excluded from MUAC analysis
  3. % missing for age category is % missing birthday/exact DOB
  4. P-values were calculated using non-parametric tests
  5. *p < 0.05; **p < 0.01; ***p < 0.001
  6. a Difference between 6–23 and 24–59 months age groups
  7. bCorrelation between 6–23 and 24–59 age groups
  8. 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
  9. dDifference between sub-set of children with exact date of birth and children for whom age was estimated to the nearest month