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DE LA SALLE HEALTH SCIENCES INSTITUTECOLLEGE OF MEDICINE
DEPARTMENT OF FAMILY AND COMMUNITY MEDICINE
CM2 SY 2011-2012
REVISED OUTPUTS 8 & 9: PLAN FOR DATA ANALYSIS
Exposure to Air-conditioning Systems in Classrooms Leads to Mild Severity of Allergic Rhinitis in
Second Year High School Students of Selected Schools in Dasmarias City, Cavite: A Cross-
Sectional Study.
SUBMITTED ON:
January 19, 2012
SUBMITTED TO:
DR. JOVILIA M. ABONG
SUBMITTED BY:
GROUP 1A
ARCAIRA, JOSHUA A.
ABAD, MARY RAINA ANGELI
ANCHETA, JONATHAN
BASUL, CHARINE
CARAVEO, JULIEN NICOLE
CRUZ, SPICA
ESPINOZA, FAITH KRISTINE
GARCIA, RAY WILSON
KALALO, GERARD MICHAEL
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REVISED OUTPUTS 8 & 9: PLAN FOR DATA ANALYSIS
GROUP 1A, DR. JOVILIA M. ABONG
RESEARCH QUESTION:
Among second year high school students with allergic rhinitis of selected schools in Dasmarias, Cavite,
will exposure to air-conditioned school rooms affect the severity of their allergic rhinitis?
RESEARCH OBJECTIVES
General Objective: To determine if the exposure to the air-conditioning system affects the severity
of allergic rhinitis in second year high school students of selected schools in Dasmarias, Cavite.
Specific Objectives:
1. To identify the prevalence of allergic rhinitis among second year high school students of
selected schools in of Dasmarias, Cavite based on their classroom conditions (air-conditioned
vs. non-air-conditioned).2. To determine the severity of allergic rhinitis according to ARIA classifications.
3. To identify the risk factors of allergic rhinitis present in the classroom or school, such as the
presence of molds, chalk dust, house dust, and cockroaches.
4. Compare the severity of allergic rhinitis in students who are exposed to air-conditioned
classrooms and those who are not exposed to air-conditioned classrooms.
RESEARCH DESIGN
A Cross-Sectional type of research design will be implemented in this study to determine if there is a
relationship between exposure to air-conditioning system in the classroom and mild severity allergic
rhinitis.
PLAN FOR DATA ANALYSIS
1. DESCRIPTIVE STATISTICS
A. Measures of Disease Frequency
The data that will be gathered are the number of second year high school students with air-
conditioned and non-air-conditioned classrooms with Allergic Rhinitis as well as the severity of
their condition (mild or moderate-severe).
The measure of disease frequency to be used is point prevalence because by definition, it
indicates the proportion of individuals in a population who have a particular disease at a specified
point in time wherein our population would be second year high school students with allergic
rhinitis and the disease to be measured is the severity of their condition. The frequencies of mild
and moderate-severe allergic rhinitis will be summarized in a frequency distribution table and
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these frequencies will be used to compute for the point prevalence. The frequencies will also be
presented in a bar graph to see the differences easily.
C. Measures of Central Tendencv
The measure of Central Tendency to be used in the study is the Mode because it is primarilyconcerned with the frequency of mild allergic rhinitis in students with and without exposure to
the aforementioned classroom conditions. The mean and median will not be used because they
are not applicable to the study.
D. Measures of Dispersion
Since the data to be gathered will just be prevalence of the severity of allergic rhinitis, no mean or
median will be used, and the sample sizes for both exposure types are equal, the range, standard
deviation, variance and coefficient of variance will not be used.
B. Measures of Association
Since this is a cross-sectional study, our measures of association will be based on the prevalence
ratio, in which the relationship of those exposed to an air-conditioning system in the classroom
and the mild severity of the patients Allergic Rhinitis is evaluated using the following equation:
)/(
)/(Pr
dcc
baatioevalenceRa
;
Wherein: A = number of students with mild allergic rhinitis in air-conditioned classrooms
B = number of students with moderate-severe allergic rhinitis in air-conditioned
classroomsC = number of students with mild allergic rhinitis in non-air-conditioned classrooms
D = number of students with moderate-severe allergic rhinitis in non-air-conditioned
classrooms
Prevalence of Mild Severity AR in air-conditioned classrooms
Prevalence Ratio = Prevalence of Mild Severity AR in non air-conditioned classrooms
Exposure to Air-
conditioned classrooms
With Mild Allergic Rhinitis TOTAL
(+) (-)
(+) A B 101
(-) C D 101
Total A + C B + D 202
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After the prevalence ratio has been computed, the interpretation will be as follows:
PR Value Significance and Interpretation
IfPR =1 There is no association
between exposure to air-conditioned classrooms
and the prevalence of mild
severity allergic rhinitis.
IfPR > 1 There is an increased
probability of presence of
mild severity allergic
rhinitis if one is exposed to
air-conditioned
classrooms.
Suggests exposure to air-
conditioned classrooms may
be associated with increased
prevalence of mild severity
allergic rhinitis
The probability of
presence of mild
severity allergic
rhinitis among those
exposed to air-
conditioned
classrooms is xtimes more compared
to those without the
exposure.
IfPR < 1 There is a decreased
probability of presence of
mild severity allergic
rhinitis if one is exposed to
air-conditioned
classrooms.
Suggests exposure to air-
conditioned classrooms may
be associated with decreased
prevalence of mild severity
allergic rhinitis.
The probability of
presence of mild
severity allergic
rhinitis among those
exposed to air-
conditioned
classrooms is xtimes less compared
to those without the
exposure.
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