15
Based on calculations above, the minimum number of samples which representative to the population was 41 persons, which was rounded up to 50 to anticipate subjects drop out
hence the total respondent was 100. Respondents were chosen based on several limited conditions; age between 25-65 years old, body mass index range from 18-27, healthy or not
being in treatment to cure a disease in the research time, and willing to participate as respondent
.
2. Data Collection
a. Data Type and Method of Collection
There were two types of data collected; primary and secondary data. Primary data consisted of respondent socioeconomic and nutritional status, food
consumption, blood pressure, and total blood cholesterol level. Meanwhile, secondary data collected including Bogor sociodemographic characteristic and food
composition database of plant sterol content. The plant sterol database was required to estimate the intake of plant sterols in respondents. Briefly, data type and method
of collection are depicted in the Table 7. Table 7.
Data type and method of collection
No Data
Method of Collection
Primary Data 1
Socioeconomic status of respondents
Interview by using questionnaire see Appendix 1
2 Food consumption
Interview by using food frequency questionnaire
3 Nutritional status based on
body mass index Anthropometric measurement by using
microtoise d = 0,1 cm for body height and body weight scale d = 0,1 kg
4 Blood pressure
Blood pressure measurement, performed by medical professional
5 Total blood cholesterol
Total blood cholesterol measurement, performed by using cholesterol home test kit
by medical professional Secondary Data
6 Bogor sociodemographic
characteristic The website of Bogor rural area and Bogor
Regional Census 2010 7
Data of plant sterols content in foods
- USDA SR-24 food database and other related journals or scientific publication
- Calculation based on recipe
b. Food Frequency Survey Supariasa et al. 2001
The principle of this method is to record the consumption frequency of certain foods or food ingredients during a month backward. Recapitulation then
performed to get an overview of food consumption patterns qualitatively. To obtain
