Infancy weight gain, parental socioeconomic position, and childhood overweight and obesity: a Danish register-based cohort study

Table 4 Analyses of additive interaction

Groups compared		n^a	RERI	95% CI
Weight gain category	Education level
Mean vs. rapid	Low vs. high	8651	0.11	− 0.82 to 1.05
Mean vs. very rapid	Low vs. high	8110	0.62	−1.32 to 2.56
Weight gain category	Income level
Mean vs. rapid	Low vs. high	8651	−0.19	−1.19 to 0.81
Mean vs. very rapid	Low vs. high	8110	1.07	−0.97 to 3.11

Relative excess risk due to interaction (RERI) and 95% confidence intervals (95% CI) when testing additive interaction between infancy weight gain category and education level, and infancy weight gain category and income level, calculated based on the complete case population (n = 13,157). ^aNumber of subjects included in calculation. Calculations are based on the subjects that posit the values studied in each row

ISSN: 1471-2458