91q: best method to measure goiter prevalence rate in a community is ?
a. neonatal hypothyroidism
b. iodine level in salt
c. adult hypothyroidism
d. thyroid function test screening
92q: carrier stage is not found in ?
a. cholera
b. pertussis
c. typhoid
d. diphtheria
93q: incubation period of pertussis is ?
94q: disease among exposed minus disease among non-exposed is equal to ?
a. relative risk
b. attributable risk
c. odd ratio
d. proportion risk
95q: for a survey , a village is divided into 5 lanes , then each lane is sample randomly . it is an example of ?
a. simple random sampling
b. stratified random sampling
c. systemic random sampling
d. all the above
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