confounding can be removed by?
.<p>a confounding factor is defined as one which is associated both with exposure and disease,and is distributed unequally in study and control groups.more specifically a confounding factor is that which,although associated with exposure under investigation,is itself independently of any such association ,a risk factor for the disease.in ceain cases the confounding effect due to age can be neutralized by matching so that the concerned groups have an equal propoion</p><p>ref:park&;s textbook of preventive and social medicine ,22 nd edition,page no 69</p>
Assign confounding to both cases and controls
Stratification
Matching
All of the above
Epidemiology