Indoor Air Pollution and Respiratory Function on Primary School Students in West Jakarta, Indonesia

Table 2: Frequency distribution of individual characteristics and environmental factors.

Variable	Frequency Distribution (n=100)
Variable	Number	%
Age
≥11 years	55	55
10 years	45	45
Sex
Female	49	49
Male	51	51
Nutritional status
Abnormal	47	47
Normal	53	53
Physical activity
Lack	49	49
Sufficient	51	51
Temperature
<18⁰or>30⁰C	86	86
18-30⁰C	14	14
Humidity
<40%Rh and>60%Rh	93	93
40-60% Rh	7	7
Ventilation
Proper	16	16
Improper	84	84
Students’ density
Proper	16	16
Improper	84	84