This study investigated changes in periodontal outcomes after nonsurgical periodontal treatment (NSPT) and evaluated associations of change in salivary resistin level with periodontal outcomes in obese Malaysians with chronic periodontitis. Sixty-two obese adults with chronic periodontitis were randomly divided into a test group (n = 31), which received NSPT, and a control group (n = 31), which received no treatment. Plaque score (PS), gingival bleeding index (GBI), probing pocket depth (PPD), and clinical attachment loss (CAL) were measured at baseline and at 6 and 12 weeks after NSPT. Salivary resistin levels were evaluated by using an enzyme-linked immunosorbent assay. PS was significantly lower in patients who received NSPT than in the control group at 6 and 12 weeks (P < 0.05). In the NSPT group the percentages of sites with shallow and moderate pockets decreased significantly, but there was no significant change in deep pockets. Resistin levels significantly decreased after NSPT (P < 0.05). Change in salivary resistin level was not significantly associated with periodontal outcomes. In obese Malaysians, NSPT significantly improved PS and GBI, and improved PPD and CAL for shallow and moderately deep pockets but not for deep pockets. Salivary resistin level was not associated with improvement in either periodontal variable.

Different diachronous citing units were used to determine if there are differences between rankings of journals measured by synchronous impact factors of first-and late-comer journals. A 5 year impact factor was chosen, with citation lags identified as a complementary method for first comers and alternative measurement for late comers. Selected diachronous indices were considered as alternatives for evaluating the short and long term performance of late comers without citation lags. The results show that the most significant index that promotes scientific fairness and recognition is the citation concentration index. As older journals gathered higher citations, this index enables late-comers to catch up with the citations. Hence, the diachronous impact factor is useful in providing a fairer assessment of the impact of the late-comer journals and could be used as a baseline for ranking ISI journals.

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