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Table 1 Characteristics of included studies

From: Association between periodontal disease and mortality in people with CKD: a meta-analysis of cohort studies

Study Design Region Age (years) No. of participants (no. of male participants) Median follow-up duration (years) CKD stage Assessment methods and definitions for periodontal disease Outcome assessment
Blach (26) 2009 Prospective cohort study Poland Mean 42.5 years 117 (77) 60 months Kidney transplantation CPITN All cause death
Kshirsagar (15) 2009 Retrospective study America Mean 53.6 years 168 (77) 18 months hemodialysis PPD, CAL All cause and cardiovascular death
Chen (16) 2011 Prospective cohort study Taiwan 58.8 ± 0.8 years 253 (117) 6 years Hemodialysis PPD, CAL All cause and cardiovascular death
Souza (24) 2014 Prospective cohort study Brazil Mean 50 years 122 (79) 64.1 ± 11.2 months Clinically stable patients undergoing HD PPD, CAL All cause death
Palmer (28) 2015 Prospective cohort study Europe and South America Mean 59.1 years 3338 (1973) 6150 person-years of follow-up Hemodialysis CPITN All cause and cardiovascular death
Ricardo (14) 2015 Prospective cohort study America Mean 53.5 years 1335 (544) 14 years CKD PPD, CAL All cause and cardiovascular death
Chen (27) 2015 Longitudinal, observational, community-based cohort study Taiwan ≥65 years NA 3.8 years CKD without ESRD CPITN All-cause death
Ruokonen (25) 2016 Prospective cohort study Finland   144 (97) 157 months Predialysis PPD,CAL All cause death
  1. Abbreviations: PPD periodontal probing depth, CAL clinical attachment loss, PDI periodontal disease index, CPITN Community Periodontal Index of Treatment Needs, BMI body mass index, CVD chronic vascular disease, CRP high sensitivity C-reaction protein, eGFR estimated glomerular filtration rate, DMF-T decayed, missing, and filled teeth index, NA not available