Table 2 Minimum meaningful differences between control and intervention groups, and those detectable with 80% power, 5% significance (two-tailed) for endpoint sample size of 265 per group, assuming a design effect of 2.9.

Fruit^a

82 vs ≥ 95%⁽ⁱⁱⁱ⁾

82 vs ≥ 95%

Offer new food >10 times^b

28 vs ≥ 75%⁽ⁱⁱⁱ⁾

28 vs ≥ 48%

Vegetable^a

67 vs ≥ 95%⁽ⁱⁱⁱ⁾

67 vs ≥ 84%

Refuses food- assume not hungry, take food away often/very often/always^b

56 vs ≥ 84%⁽ⁱ⁾

56 vs ≥ 75%

Salty snacks^a

27 vs ≤ 17%⁽ⁱⁱ⁾

27 vs ≤ 11%

Refuses food-offers no replacement food often/very often/always^b

29 vs ≥ 44%⁽ⁱ⁾

29 vs ≥ 49%

Sweet beverages^a

44 vs ≤ 28%⁽ⁱⁱ⁾

44 vs ≤ 25%

Use food as reward 'hardly ever'^b

55 vs ≥ 83%⁽ⁱ⁾

55 vs ≥ 74%

Fried potato^b

17 vs ≤ 8%⁽ⁱ⁾

17 vs ≤ 5%

Insist child eat 'hardly ever'^b

46 vs ≥ 69%⁽ⁱ⁾

46 vs ≥ 66%