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Table 3 Beverages, median weekly frequencies and correlation coefficients

From: Test-retest reliability of a new questionnaire on the diet and eating behavior of one year old children

  n 1 Median test Median retest Spearman’s r Cohen’s kappa 2
Breastmilk in daytime3 37 17.5 17.5 0.88 0.65
Breastmilk at night3 37 14 14 0.85 0.87
Formula milk 94 0 0 0.97 0.62
Full-fat cow’s milk 94 0 0 0.76 0.87
Reduced-fat cow’s milk 94 2 0 0.86 1.00
Cultured cow’s milk 94 0 0 0.94 0.67
Liquid yoghurt 94 0 0 1.00 0.40
Water 94 35 35 0.77 0.61
Child’s beverage 94 0 0 0.70 0.83
Sugared non-fizzy drink 94 0 0 0.73 0.33
Artificially sweet fizzy drink 94 0 0 0.95 1.00
Rruit juice 94 0 0 0.71 0.66
Other beverage 94 0 0 1.00 0.72
  1. Very few respondents using most items on list. Items omitted if not used by any respondents. 1Number responding varies according to applicability of question. 2Scale and frequency variables were ranked into quartile categories for calculating Cohen’s kappa 3Breastmilk frequency in day/eve reported separately from breastmilk at night. All correlation measures significant at p ≤ 0.001.
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