National Health and Morbidity Survey (NHMS) 2019
- boonhow chew
- Jun 3, 2020
- 2 min read
Some Background Information on the Methodology
[Emails: nhms.iku@moh.gov.my; dr.shubash@moh.gov.my]
· 16 states and federal territories (all in Malaysia)
· 477 clusters, 26 houses per cluster with 12 houses for non-communicable (NCD) questionnaire and 14 for healthcare demand (HCD) questionnaire
· The clusters were randomly selected by a third party, Department of Statistics Malaysia (DOSM).
· »12,000 residential units
· »33,000 respondents with 14,965 (response rate 87.2%) responded to NCD assessment and 16,688 to HCD (88.8%). Sample size was calculated and powered for state-level analysis, thus the national-level results have over-samples.
· Proportionate sampling based on state populations in urban and rural areas
· 353 research assistants/data collectors
This means on average there are 3 per household members are recruited.
Every randomly chosen family will be visited by a group of 6 RAs comprise 4 interviewers, I nurse and I supervisor. Spend 45 to 60 mins for the data collection process consisting of interviews, self-administration (those qualified?) and physical assessment. Used eNHMS system.
Anthropometry: ≥ 13-year-old, Height, Weight and Waist Circumference; ≥ 60-yo have calf circumference measured.
Blood pressure, Sugar and Cholesterol: ≥ 18-yo, on fasting with finger prick samples.
Haemoglobin: ≥ 15-yo, with finger prick samples.
Representativeness: Income strata will be self-reported and presented as income quintiles and in B40, M40 and T20 based on DOSM state-specific cut-off. Occupational classes are reported based on occupational sectors: government, private, self-employed, students, retirees, and those not employed. Education is reported based on highest education level: no formal education, primary school, secondary school and tertiary education. All these classes are reported for every outcome measure in our report, including further explanation of the respondent characteristics in the General Findings section of our report.
Measurements: Measures to ensure accuracy and compliance of our data collection procedures include a standard one-week long training of the RAs, including all nurses and supervisors involved in the data collection. There are field supervisors throughout the duration of the survey. Field supervisors consist of officers from the institute (IKU?), to monitor data collection and compliance of survey procedures. One field supervisor monitors 3 to 5 teams in each state, sometimes with 2 fields supervisors for bigger states with larger number of data collection teams. Furthermore, all data is submitted online to a central server in IKU. The server data is checked for extreme and inconsistent values daily, to pick up any errors that may have occurred.
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