Blood Pressure - Blood pressure was measured in triplicate from the right arm where possible, leaving five minutes between each measurement. The measurement was taken with the respondent sitting on a well-supported chair, with feet placed firmly on the floor. Prior to the measurement, respondents were asked to sit quietly without talking or laughing for at least five minutes. Respondents were asked to remove tight clothing from their upper arm and to rest their arm such that the antecubital fossa (triangular cavity of the elbow joint) was at the level of the heart, palm facing upwards. Measurements were taken in accordance with the manufacturer's instructions for the OMRON M6 Comfort blood pressure monitor, with fieldworkers having received training in taking the measurement prior to fieldwork. Respondents were asked whether they had had anything to eat or drink (besides water) or whether they had smoked in the 30 minutes prior to the measurement. This information was recorded by the fieldworker. Respondents were informed of blood pressure readings that consistently fell outside of the normal ranges and advised to visit their health nurse or general practitioner for another reading.