Table 1. Characteristics of the studies included.
PI: Plaque Index; GI: Gingival Index; OHIP: Oral Health Impact Profile; OHIP-EDENT: Oral Health Impact Profile in Edentulous; GOHAI: Geriatric Oral Health Assessment Index; GOHAI-Ar: Geriatric Oral Health Assessment Index-Arabic; QoL-OS/DS: Quality of Life-Oral and Dental Subscale; DMFS: Decayed Missed Filled Surfaces; SiC: Significant Caries; DAI: Dental Esthetic Index; CPQ11-14: Child Perception Questionnaire for 11- to 14-year-Old Children; DMFT: Decayed Missed Filled Teeth; COHIP-19: Child Oral Health Impact Profile; Child-OIDP: Children's Version of the Oral Impacts on Daily Performance; IOTN: Index of Orthodontic Treatment Need.
| S. no | Author/Year | Region | Study design | Sample size | Age group | Oral disease/condition (Instrument) | OHRQoL (Instrument) |
| 1 | Anbarserri NM et al., 2020 [7] | Riyadh | Cross-sectional | 152 | 18 years and above | Tooth loss (PI, GI, and complete periodontal examination) | OHIP‐14 |
| 2 | AlBaker AM, 2013 [8] | Riyadh | Cross-sectional | 55 | 42-75 years | Single or both arches complete edentulism (complete oral examination) | OHIP-EDENT and GOHAI |
| 3 | Alshammari M et al., 2018 [9] | Hafar Al-batin | Cross-sectional | 200 | 65 years and above | Partial edentulism, single arch complete edentulism or both arches complete edentulism (complete oral examination) | GOHAI-Ar |
| 4 | Alrumyyan A et al., 2020 [12] | Riyadh | Cross-sectional | 528 | 18 years and above | Fixed dental prosthesis (questionnaire) | OHIP‐14 |
| 5 | Bahammam MA and Fareed WM, 2019 [15] | Jeddah | Experimental study | 24 | 18-60 years | Dental implants (clinical examination) | QoL-OS/DS |
| 6 | Bukhari OM, 2020 [17] | Makkah | Cross-sectional | 160 | 18-60 years | Dental (DMFS) and (SiC) | OHIP-14 |
| 7 | Dawoodbhoy I et al., 2013 [19] | Al-Khobar | Cross-sectional | 278 | 11-14 | Malocclusion (DAI) | CPQ11–14 |
| 8 | Agou S, 2020 [20] | Jeddah | Cross-sectional | 87 | 18 years and above | Malocclusion (IOTN) | OHIP-14 |
| 9 | Altouki et al., 2020 [21] | Jeddah | Cross-sectional | 109 | 12-25 | Malocclusion (IOTN) | OHIP-14 |
| 10 | AlMutairi FFJ et al., 2020 [24] | Riyadh | Cross-sectional | 40 | 12-15 | Dental caries (DMFT) and gingival status (GI) | COHIP-19 |
| 11 | AlZahrani et al., 2019 [2] | Al Baha | Cross-sectional | 349 | 12-15 | Dental caries (DMFT), gingival status (GI), and plaque scores (PI) | Child-OIDP |
| 12 | AlKattan R et al., 2017 [26] | Riyadh | Cross-sectional | 25 | 18 years and above | Periodontal status (complete oral examination) | OHIP‐14 |