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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Clin Nutr. 2018 Mar 12;38(2):767–773. doi: 10.1016/j.clnu.2018.03.002

Table 2.

Twin intra-pair correlations with 95% CI for timing of food intake and related traits

Intra-pair correlation coefficients
r MZ
(CI 95%)		 r DZ
(CI 95%)
Food intake timing
Breakfast timing 0.56 (0.26, 0.74) 0.29 (−0.12, 0.59)
Lunch timing 0.40 (0.06, 0.63) 0.15 (−0.26, 0.50)
Dinner timing 0.36 (−0.03, 0.63) 0.42 (0.08, 0.66)
Midpoint of food intake 0.64 (0.39, 0.79) 0.438 (−0.16, 0.61)
Sleep and wake timing
Wake timing 0.54 (0.26, 0.73) 0.37 (−0.06, 0.65)
Bed timing 0.42 (0.10, 0.65) 0.02 (−0.36, 0.40)
Chronotype (MEQ) 0.42 (0.11, 0.64) 0.23 (−0.22, 0.57)

r MZ: monozygotic intra-pair correlation coefficient, r DZ: dizygotic intra-pair correlation coefficient, CI (95%): confidence interval, MEQ; Morning-Evening Questionnaire.