From:  Relationship between gingival and peri-implant sulcular fluid active matrix metalloproteinase-8 concentration and clinical indices in healthy and diseased conditions

Demographic data of the study population

Demographic variableHealthGingivitis/peri-implant mucositisPeriodontitis/peri-implantitis
Number of patients151515
Sex (males/females)7/88/87/7
Mean age
Range (years)		40
18–62		42
18–64		31
19–61
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