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Figure 1 | Chinese Journal of Cancer

Figure 1

From: Incidence trend of nasopharyngeal carcinoma from 1987 to 2011 in Sihui County, Guangdong Province, South China: an age-period-cohort analysis

Figure 1

The age-standardized rates (ASRs) of nasopharyngeal carcinoma (NPC) incidence for males and females in Sihui County, Guangdong Province, South China from 1987 to 2011. The ASRs were calculated using the world standard population method of Segi (1960). The NPC incidence in Sihui County fluctuates within a small range for both sexes.

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