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

BMC Research Notes

Table 3 Beverages, median weekly frequencies and correlation coefficients

	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

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.

ISSN: 1756-0500