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Letter
Author response: ‘Does cadmium exposure contribute to depressive symptoms in the elderly population?’
  1. Changwoo Han1,
  2. Youn-Hee Lim2,3,
  3. Yun-Chul Hong1,2,3
  1. 1 Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
  2. 2 Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea
  3. 3 Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea
  1. Correspondence to Dr Yun-Chul Hong, Department of Preventive Medicine, Seoul National University College of Medicine, 103 Daehangno, Jongno-gu, Seoul 110-799, Republic of Korea; ychong1{at}snu.ac.kr

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We thank Dr Tomoyuki Kawada1 for his interest in our manuscript entitled ‘Does cadmium exposure contribute to depressive symptoms in the elderly population?’2 In the letter, Dr Kawada depicted three possible reasons for the inconsistent results of our study: limited statistical power, use of blood cadmium as marker of cadmium exposure and the presence of other potential confounding variables.

First, we agree with Dr Kawada's opinion on the limited statistical power of the study regarding the …

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