<prompt> True regarding secular trends-Changes in disease pattern in terms of monthsChanges in disease pattern seasonallyChanges in disease pattern over a sho period of timerChanges in disease pattern over a long period of time  <response>: .long term or secular trends implies changes in the occurrence of disease over a long period of time.generally several years or decades.a secular trend implies a consistent tendency to change in a paicular direction or a definitive movement in one direction. ref:park;s textbook,ed 22,pg no 63 