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Table 7 Modification of the effect of diabetes mellitus on risk of developing cataracts by hypertension

From: Cataract subtype risk factors identified from the Korea National Health and Nutrition Examination survey 2008–2010

  Diabetes Mellitus (DM) RR (95% CI); p for with versus without DM within strata of hypertension
No Yes
Hypertension % RR (95% CI) % RR (95% CI)
  No 2852/7502 (38%) 1.0 345/531 (65%) 1.7 (1.4–2.2) p < 0.01 1.7 (1.4–2.2) p < 0.01
  Yes 1757/2735 (64%) 1.2 (1.1–1.3) p < 0.01 565/736 (77%) 2.0 (1.6–2.5) p < 0.01 1.1 (0.9–1.5) p = 0.37
  1. Measure of effect modification on additive scale: RERI (95% CI) = 0.1(−0.5 ~ 0.6); p = 0.85.
  2. Measure of effect modification on multiplicative scale: ratio of RRs (95% CI) = 1.0 (0.7 ~ 1.3); p = 0.78.
  3. RRs are adjusted for age, sex, household monthly income, and education.
  4. RR: relative risk, RERI; relative excess risk due to interaction, CI; confidence interval.