Table 1.

Inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
Singapore citizens and PRs residing in Singapore	Non-Singapore citizens and non-PRs
Age ≥18 years
Ethnicity: Chinese, Malay, Indian and Other ethnic groups	Incapable of doing the interview
Can speak English, Mandarin, Malay or Tamil	Living out of the country throughout the field period
	Long-term hospitalisation or institutionalisation throughout the field period

PRs, permanent residents.