Table 1.
Basic characteristics of study.
| First author, Year | Country | Settings | Study design | Sample size | Age | Tools | Prevalence %/score | Quality assessment score |
|---|---|---|---|---|---|---|---|---|
| Ayoob, 2024 (17) | India | Health centres | Cross-sectional | 250 | 68 ± 6.02 | Oral functions and dental status | 74% | 7 |
| Baba, 2022 (9) | Japan | Community | Cross-sectional | 210 | 74.2 ± 6.1 | Dental status, oral functions and subjective assessments | 8.10% | 10 |
| Chew, 2023 (18) | Singapore | Hospital | Cross-sectional | 465 | 79.2 ± 8.3 | ROAG | 25% | 9 |
| Cruz-Moreira, 2023 (10) | Ecuador | Care homes | Cross-sectional | 589 | 72 (66–82) | Oral function and subjective assessments | 71% | 10 |
| Diaz-Toro, 2022 (31) | Chile | Community | Cross-sectional | 1,186 | ≥60 | Dental status and oral functions | – | 8 |
| Hasegawa, 2020 (19) | Japan | Community | Prospective | 425 | 72.2 ± 5.6 | Dental status and oral functions KCL. | 49.60% | 9 |
| Hoshino, 2021 (7) | Japan | Community | Cross-sectional | 481 | 75.9 ± 6.3 | Dental status, oral functions and subjective assessments | 21.20% | 10 |
| Ishii, 2022 (20) | Japan | Clinic | Cross-sectional | 111 | 79.7 ± 3.8 | OFI-8 | 53.20% | 10 |
| Iwasaki, 2020 (5) | Japan | Community | Cross-sectional | 1,054 | 77 ± 4.8 | Dental status, oral functions and subjective assessments | 20.40% | 10 |
| Iwasaki, 2020 (11) | Japan | Community | Prospective | 466 | 76.4 ± 4.1 | Dental status, oral functions and subjective assessments | 14.40% | 9 |
| Iwasaki, 2021 (21) | Japan | Community | Cross-sectional | 1,082 | 77.1 ± 4.7 | Dental status, oral functions and subjective assessments | 21.00% | 10 |
| Iwasaki, 2024 (12) | Japan | Community | Cross-sectional | 1,206 | 74.7 ± 5.5 | OF-5 | 36.70% | 10 |
| Kamdem, 2017 (22) | Switzerland | Community | Cross-sectional | 992 | 74.9 ± 1.39 | Dental status and oral functions | 14.80% | 10 |
| Kamide, 2023 (23) | Japan | Community | Cross-sectional | 237 | 76.0 ± 5.7 | OFI-8 | 54.90% | 8 |
| Kimble, 2023 (32) | United Kingdom | Community | Prospective | 5,212 | 70–92 | Dental status, oral functions and subjective assessments | – | 9 |
| Komatsu, 2021 (33) | Japan | Community | Cross-sectional | 380 | 72.8 ± 5.6 | Dental status, oral functions and subjective assessments | 14% | 9 |
| Kugimiya, 2020 (24) | Japan | Community | Cross-sectional | 679 | 76.3 ± 6.5 | Dental status, oral functions and subjective assessments | 22.50% | 10 |
| Kuo, 2022 (34) | Taiwan | Community | Cross-sectional | 308 | 79.7 ± 7.2 | Oral frailty checklist | 4.87 ± 2.51 | 10 |
| Nagatani, 2023 (25) | Japan | Community | Prospective | 1,410 | 72.4 ± 5.2 | Dental status, oral functions and subjective assessments | 16.90% | 9 |
| Nishimoto, 2023 (26) | Japan | Community | Prospective | 1,234 | 72.2 ± 5.1 | Dental status, oral functions and subjective assessments | 23.10% | 9 |
| Ohara, 2020 (13) | Japan | Community | Cross-sectional | 722 | 79.1 ± 4.5 | Dental status and oral functions | 19.30% | 10 |
| Shimazaki, 2020 (27) | Japan | Community | Cross-sectional | 978 | 65–85 | Dental status, oral functions and subjective assessments | 60% | 10 |
| Shwe, 2023 (35) | Australia | Hospital | Cross-sectional | 115 | 80 ± 8.0 | OHAT | 4.3 ± 2.3 | 9 |
| Tanaka, 2023 (28) | Japan | Community | Prospective | 2031 | 73.1 ± 5.6 | OF-5 | 39.30% | 9 |
| Tani, 2022 (36) | Japan | Community | Cross-sectional | 381 | 72.6 ± 3.9 | Dental status and oral functions and ODK | 7.9 ± 1.2 | 9 |
| Velázquez-Olmedo, 2021 (29) | Mexico | Community | Prospective | 663 | 68.1 ± 6.1 | Dental status and oral functions. | 21.30% | 9 |
| Watanabe, 2016 (37) | Japan | Community | Cross-sectional | 4,720 | 72.1 ± 5.6 | Dental status and oral functions, and ODK | – | 9 |
| Yoshida, 2021 (30) | Japan | Community | Cross-sectional | 340 | 75 | Dental status, oral functions and subjective assessments | 53.50% | 9 |
ODK, oral diadochokinesis; ROAG, The Revised Oral Assessment Guide; KCL, Kihon checklist; OFI-8, The Oral Frailty Index-8; OF-5, Oral Frailty 5-Item Checklist; OHAT, Oral Health Assessment Test.