Table 6.

Snacks, salt, sugar and vitamin supplements, median weekly frequencies and correlation coefficients

	n	Median test	Median retest	Spearman’s r	Cohen’s kappa 1
Fruit or vegetable as snack	94	5	5	0.76	0.42
Plain yoghurt	94	0	0	0.64	0.54
Sweetened yoghurt	94	2	2	0.83	0.65
Ice cream	94	0	0	0.33	0.31
Cookies/crackers	94	0	2	0.84	0.65
Cake/waffle	94	0	0	0.66	0.66
Sweet roll	94	0	0	0.57	0.56
Chocolate	94	0	0	0.69	0.61
Salt snack foods	94	0	0	0.66	0.54
Salt added to child’s food	94	0	0	0.70	0.52
Sugar added to child’s food	94	0	0	0.59	0.58
Cod liver oil2	94	0	0	0.92	0.82
Vitamin D drops	94	0	0	0.96	0.88
Other fish oil	94	0	0	0.84	0.66
Multivitamin supplements	94	0	0	0.90	0.69

¹Scale and frequency variables were ranked into quartile categories for calculating Cohen’s kappa. ²Norwegian health authorities recommend daily cod liver oil for everyone over 6 weeks old. All correlation measures significant at p ≤ 0.001.