55 - AIIMS community medicine mcqs or social and preventive medicine mcqs ( spm or psm ) from all previous years AIIMS papers with answers - part 45

226q: vitamin A deficiency is considered a public health problem if prevalence rate of night blindness in children between 6 months to 6 years is more ?

a. 0.01 %
b. 0.05 %
c. 0.1 %
d. 1.0 %

answer d . 1.0 %

227q: the highest perecentages of PUFAs are present in ?

a. groundnut oil
b. soyabean oil
c. margarine
d. palm oil

answer b . soya bean oil .

In the decreasing order of content of PUFA :

1. SAFFLOWER OIL ,
2. SUNFLOWER OIL,
3. CORN OIL,
4. SOYABEAN OIL,
5. COTTON OIL,
6. MARGARINE OIL,
7. GROUNDNUT OIL,
8. PALM OIL,
9. BUTTER and
10. COCONUT OIL .

228q: a randomized trial comparing efficacy of two regimens showed that difference is statistically significant with P greater than 0.001 but in reality the two drugs do not differ in their efficacy . this is an example of :

a. type-I error ( alpha error )
b. type-II error ( beta error )
c. I-alpha
d. I-beta

answer a. type-I error ( alpha error )

229q: histogram is used to describe ?

a. quantitative data of a group of patients
b. qualitative data of a group of patients
c. data collected on nominated scale
d. data collected on ordinal scale

answer a . quantative data of group of patients .

230q: a physician after examining a group of patients of a certain disease , classifies the condition of each one as NORMAL, MILD, MODERATE or SEVERE . which one of the following is the scale of measurement that is being adopted for classification of the disease condition ?

a. nominal
b. interval
c. ratio
d. ordinal

answer d . ordinal .

9 - AIIMS november 2002 community medicine mcqs - part 3

11q: prevalence of a disease :

a. is the best measure of the disease frequency in etiological studies
b. can only be determined by a cohort study
c. is the number of new cases in a defined population
d. describes the balance between incidence,mortality and recovery

answer d. describes the balance between incidence,mortality and recovery

12q: in a controlled trial to compare two treatments , the main purpose of randomization is to ensure that :

a. the two groups will be similar in prognostic factors
b. the clinician does not know which treatment the subjects will receive
c. the sample may be referred to a known population
d. the clinician can predict in advance which treatment the subjects will receive

answer a. the two groups will be similar in prognostic factors

13q: a randomized trial comparing the efficacy of two drugs showed a difference between the two with a p value of less than 0.005. in reality however the two drugs do not differ . this is therefore an example of ?

a. type 1 error ( alpha error )
b. type 2 error ( beta error )
c. 1- alpha
d. 1- beta

answer a. type 1 error ( alpha error )

14q: the number of patients required in a clinical trial to treat a specific disease increases as :

a. the incidence of the disease decreases
b. the significance level increases
c. the size of the expected treatment effect increased
d. the drop out rate increases

answer d. the drop out rate increases