Fig. 5From: Oral cavity cancer trends over the past 25 years in Hong Kong: a multidirectional statistical analysisEstimated period and alternative period models (relative risks) among women. Estimated period and alternative period models (relative risks), and the 95 % confidence interval (C.I.) of oral cancer incidence rates among women, from 1986 to 2010. A continuous line represents the best fit modelBack to article page