According to the population health survey in 2014/2015, the overall prevalence of self-reported doctor-diagnosed hypertension was 17.8% (17.9% for females and 17.6% for males) for people aged 15 and above. The prevalence of hypertension rapidly increases from 45.8% for people aged 65-74 to 61.2% for people aged 85 and above (Centre for Health Protection, 2017).

References:

Centre for Health Protection. (2017). Report of Population Health Survey 2014/15. Retrieved from https://www.chp.gov.hk/en/static/51256.html