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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Secular trend is
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The correct answer is  The term secular trend implies changes in the occurence of diseases (i.e. A progressive increase or decrease)over a long period of time generally several years or decades.(refer pg no: 66 park 23 rd edition)