138 - AIIMS community medicine mcqs or social and preventive medicine mcqs ( spm or psm ) from all previous years AIIMS papers with answers - part 31

156q: true about cross sectional study are all except ?

a. less expensive
b. less time required
c. many outcomes are possible
d. relationship between cause and effect possible

 answer d. relationship between cause and effect possible 

157q: chandler’s index is meant for ?

a. filariasis
b. ankylostoma
c. guinea worm
d. round worm

 answer  b. ankylostoma . 

158q: extra calories required during lactation ?

 answer 550 kcal .

159q: all are true regarding case fatality rate except ?

a. killing power of disease
b. more useful in chronic diseases
c. value changes with different epidemic
d. time interval is not considered

 answer  b . it is rarely useful in chronic diseases .

160q: time interval between primary and secondary case is ?

a. serial interval
b. extrinsic incubation period
c. period of communicability
d. intrinsic incubation period

 answer a. serial interval