Table 3: Summary of prevalence studies.
| Paper | Study design | Study setting | Screening tools used | Sample size | Participant characteristics | Prevalence of dementia/MCI* | Additional remarks/highlights of the study |
| de Silva, et al. [23] | Descriptive survey | Ragama | Phase 1: MMSE Phase 2: Clinical Diagnosis of AD/ CAMCOG/ CAMDEX | 703 28 | older adults aged 65 years and over | Total 3.98% 95% CI (2.6-5.7) Male 3.3% Female 4.4% | - |
| Rajakumaraswamy, et al. [47] | Descriptive survey | - | MMSE CAMCOG CAMDEX | 204 | 85 males, 119 females; Mean age = 63.6 (8.3 SD) | 11.8% *32.8% | Increased risk of developing AD and VD in people with type II diabetes |
| Rodrigo, et al. [49] | Prospective study | Colombo | MMSE | 100 | older adults aged 65 years and over Mean age = 71.1 (6.32 SD) | *50% | - |
| Thanthrige, et al. [48] | descriptive analytical study | Colombo | MoCA MMSE | 50 | older adults aged 60-85 years | *66% | High risk of fall among people with cognitive impairment (p < = 0.002) |
| Coonghe [38] | mix-method study | Jaffna | MoCA_Tamil version MMSE_Tamil version | 400 Qualitative phase (n = 16) | older adults aged 65 years and over | *20.9% 95% CI (18.4-23.4) | High prevalence of MCI among elderly in Jaffna |
| Dahanayake, et al. [43] | Cross-sectional descriptive study | Colombo | MMSE NPI | 122 | older adults with dementia | 32.8% mild, 42.6% moderate and 24.6% severe | - |