Science news articles about 'chi square'

... Local recurrence was significantly associated with family history (Chi-square = 3.929, P = 0.047), ... The difference between these two groups was statistically significant (Chi-square = 6.061, P = 0.014 ...

... daily temperature and precipitation affected the annual width of tree rings. The iterative chi-square method is different from some other techniques for studying climate change because it uses daily ...

... of 808 liver biopsy specimens with chronic HBV infection. Chi-square tesing showed the monoclonal B-cells infiltrating in the liver were more frequent in the HCV-infected patients (P= ...

... . HCV patients were compared to HCV-negative individuals and controls without liver disease using Rao-Scott chi-square statistics. Adjusted hazard ratios (AHR, 95% ...

... (the extent of periodontal support that has been destroyed around a tooth) (chi square p<0.05), according to the results of a new study presented today at EULAR 2009, the Annual Congress ...

... healthy matched controls, high prevalence of oral sites presenting dental plaque and advanced attachment loss (the extent of periodontal support that has been destroyed around a tooth) (chi square p

... and log-rank test to compare actuarial survival rates. Infection, thrombosis, and surgical complication rates (chi-square test or Fisher's exact test) are compared among ...