Table 4

Tetrachoric correlations between MZ and DZ twins for selected eating behaviors
Variable Age n (twin pairs) Tetrachoric correlations
MZ DZ
Does not eat enough 2.5 346 0.91 (0.81, 1.00)* 0.46 (0.19, 0.72)
9 345 0.67 (0.45, 0.90)* −0.09 (−0.43, 0.26)
Eats too much 2.5 346 0.88 (0.75, 1.00)* 0.43 (0.10, 0.75)
9 345 0.52 (0.25, 0.80) 0.19 (−0.09, 0.47)
Eats too fast 2.5 346 0.72 (0.52, 0.92) 0.34 (0.08, 0.60)
9 346 0.50 (0.27, 0.74)* −0.02 (−0.27, 0.23)
Refuses to eat 2.5 346 0.85 (0.73, 0.96) 0.56 (0.39, 0.74)
9 345 0.82 (0.64, 0.99) 0.47 (0.21, 0.73)
Fussy about food 2.5 346 0.84 (0.65, 1.00) 0.61 (0.37, 0.86)
9 346 0.85 (0.68, 1.00)* −0.02 (−0.38, 0.34)
Eats at irregular hours 2.5 346 0.98 (0.95, 1.00) 0.95 (0.86, 1.00)
9 346 0.89 (0.74, 1.00) 0.74 (0.54, 0.95)
Eats between meals 2.5 344 0.96 (0.92, 1.00) 0.84 (0.73, 0.94)
9 346 0.81 (0.68, 0.94)* 0.46 (0.24, 0.68)
Eats a different meal 2.5 344 1.00 (0.99, 1.00) 1.00 (0.99, 1.00)
9 345 0.70 (0.48, 0.91) 0.71 (0.54, 0.88)
Skips breakfast 9 346 0.89 (0.73, 1.00) 0.77 (0.59, 0.95)
Fussy about vegetables 9 267 0.75 (0.57, 0.92)* 0.29 (0.02, 0.56)
Fussy about fruit 9 346 0.69 (0.46, 0.93) 0.50 (0.25, 0.76)
Fussy about whole-grain bread 9 345 0.80 (0.64, 0.95) 0.87 (0.78, 0.96)

*MZ is significantly different from DZ (P < 0.05). 95% CIs in parentheses.

Dubois et al.

Dubois et al. International Journal of Behavioral Nutrition and Physical Activity 2013 10:134   doi:10.1186/1479-5868-10-134

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