Fig. 1From: A comparison of DALYs for periodontal disease in China between 1990 and 2013: insights from the 2013 global burden of disease studyProvince level displayed the periodontal disease standardized DALYs rate per 100, 000 persons in 1990 and 2013 in China. a PD Standardized DALYs rate per 100,000 persons of 1990. b PD Standardized DALYs rate per 100,000 persons of 2013. c Variance ratio of PD standardized DALY rate between 1990 and 2013Back to article page