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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 …
Contributors CH wrote the response letter and all the other co-authors revised it and gave their consent for submission.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.