Table 1 Studies and population characteristics
References | Type of study | Location | Number/gender | Age (years) | Follow-up | Periodontal assessment | Intervention exposure | COPD diagnosis | Funding |
|---|---|---|---|---|---|---|---|---|---|
Zhou et al. [33] | Cross-sectional | China | 306 210 M 96 F | Mild: 65.5 ± 8.62 Mod: 64.4 ± 10.2 Severe: 63.1 ± 9.24 Very Severe:62.3 ± 11.0 | None | Periodontal examination (PI, BI, PPD, CAL) and Number of teeth Diagnostic criteria not reported | Poor periodontal health | GOLD Criteria | ISTCRG NNSFC |
Liu et al. [34] | Cross-sectional | China | 392 287 M 105 F | Cases: 64.3 ± 10.1 Controls: 63.6 ± 9.7 | None | Periodontal examination (PI, BI, PPD, CAL) Diagnostic criteria was: PD > 3 mm, CAL > 4 mm used to diagnose periodontal disease Interview re oral hygiene behaviours | Poor periodontal health | GOLD Criteria | NNSFC NSFB BSTPF |
Agado et al. [40] | Randomised control trial | USA | 30 20 M 10 F | UI:62 ± 7.76 HI:68 ± 7.20 Control:62 ± 8.33 | None | Periodontal examination (PI, CAL) Diagnostic criteria was: > 6 teeth and minimum mean CAL of 1.5 mm used to diagnose periodontal disease | Periodontal treatment | Not stated | ISUIM |
Barros et al. [37] | Prospective cohort | USA | 1635 930 M 705F | Events (No): 66.0 (5.13); Events (Yes): 63.9 (5.69) | 5 years | Periodontal examination (PPD, CAL)** | Periodontal health/edentualism | GOLD Criteria | GSK |
Kucukcokun et al. [39] | Clinical trial | Turkey | 40 35 M 5 F | Intervention: 61.8 ± 7.57 Control: 57.85 ± 12.09 | 1 year | Periodontal examination (PI, GI, PPD, BOP and CAL)# | Periodontal treatment | GOLD Criteria | NS |
Zhou et al. [38] | Randomised control trial | China | 60 47 M 13 F | Intervention: 63.9 ± 9.44, 65.3 ± 7.54 Control: 68.0 ± 7.64 | 2 years | Periodontal examination (PI, BI, PPD, CAL)* | Periodontal treatment | GOLD Criteria | NNSFC |
AbdelHalim et al. [35] | Cross-sectional | Egypt | 250 250 M 0 F | Cases: 56.75 ± 10.42 Controls: 55.28 ± 9.12 | None | Periodontal examination (PI, BI GI, PPD and CAL)## | Poor periodontal health | GOLD Criteria | NS |
Baldomero et al. [36] | Case–control | USA | 136 136 M 0 F 56 had dental exam | Cases: 66.8 (7.2) Controls: 67.5 (5.5) | None | Oral health questionnaire & Periodontal examination (PI, BOP, GI, PPD and CAL)## | Poor periodontal health | ACP, ACCP and ATS | NHLBI VACDA |