Table 1. Demographic, socioeconomic, and geographic characteristics of cohort members by levels of hearing impairment.

Characteristics	Hearing impairment (%)
	No impairment (n = 79,640)	Some trouble ≥ 13 yrs old (n = 6,670)	Some trouble < 13 yrs old (n = 706)	Deaf since ≥ 13 yrs old (n = 56)	Deaf since < 13 yrs old (n = 62)
Overall	91.4	7.7	0.8	0.06	0.07
Males	91.7	7.2	0.9	0.09	0.09
Females	91.1	8.0	0.7	0.04	0.06
Age (years)
15-19	92.5	6.7	0.8	0.00	0.00
20-29	91.0	8.0	0.9	0.05	0.07
30-39	92.0	7.1	0.8	0.06	0.07
40-49	91.5	7.6	0.8	0.10	0.06
≥ 50	88.9	10.2	0.6	0.19	0.14
Monthly income (Baht)
< 7000	91.2	7.7	0.9	0.06	0.09
7000-10000	91.1	7.9	0.9	0.05	0.06
>10000	91.7	7.5	0.6	0.08	0.06
Lifecourse urbanisation
Rural residents	92.3	6.8	0.8	0.05	0.05
Rural-urban residents	91.0	8.0	0.9	0.05	0.09
Urban residents	90.4	8.7	0.7	0.10	0.08