Table 1. Age, sex and season-standardized prevalence of plasma vitamin C adequacy status in people aged 60 years and over by location in India.
Plasma vitamin C | Adequate | Sub-optimal | Deficient |
>28 µmol/L | 11–28 µmol/L | <11 µmol/L | |
North India | |||
N = 2668 | n = 286 | n = 403 | n = 1979 |
Prevalence | 10.8 | 15.3 | 73.9 |
95%CI | 8.0, 13.5 | 13.8, 16.8 | 70.4, 77.5 |
South India | |||
N = 2970 | n = 774 | n = 853 | n = 1343 |
Prevalence | 25.9 | 28.4 | 45.7 |
95%CI | 22.9, 28.9 | 26.3, 30.6 | 42.5, 48.9 |