Table 2.

Age-standardised prevalence of hypertension by survey year and socioeconomic status in rural Yunnan Province, China

Characteristics	2011			2021
	Number (N)	Prevalence (%)	Standardised prevalence (%)	Number (N)	Prevalence (%)	Standardised prevalence (%)
Sex
Male	953	24.1	25.2	1663	44.5*†	43.1
Female	1105	26.1‡	26.8	1485	38.7†	37.9
Ethnicity
Han	1296	25.9	26.7	1841	44.6†	43.7
Naxi	493	24.7	26.3	961	38.0†	36.4
Buyi	103	19.0	19.9	254	34.0†	33.2
other	166	26.0*	26.7	92	54.1*†	52.2
Age
35–44 years	211	11.4	11.4	234	18.6†	18.6
45–54 years	395	18.6	18.6	644	33.8†	33.8
55–64 years	549	27.3	27.3	857	46.2†	46.2
65–74 years	563	40.1	40.1	903	54.1†	54.1
≥75 years	340	42.5*	42.5	510	57.6*†	57.6
Level of education
Illiterate	715	28.7*	28.5	797	46.1*†	46.6
Primary (grade 1–6) or higher	1343	23.6	25.3	2351	40.2†	38.2
Annual household income per capita (US$)
≤1083	1141	27.2*	27.7	1642	42.7†‡	41.3
>1083	917	23.0	24.3	1506	40.4†	39.2
Accessibility to medical services (min)
≥30	876	24.0	24.7	964	39.6†	38.5
<30	1182	26.0‡	27.0	2184	42.5†‡	41.4
SEP
Low	653	30.0*	28.7	756	40.6†	42.4
Lower-middle	283	25.6	27.0	797	43.9†‡	42.7
Upper-middle	718	23.7	24.7	864	42.6†	41.0
High	404	21.5	24.0	731	39.1†	35.8
Total	2058	25.1	26.1	3148	41.6†	40.4

*P < 0.01 (comparison within the same characteristic groups in the same year).

†P < 0.01 (comparison to in 2011).

‡P < 0.05.