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Fig. 3 | BMC Public Health

Fig. 3

From: Increasing trends in incidence of preterm birth among 2.5 million newborns in Guangzhou, China, 2001 to 2016: an age-period-cohort analysis

Fig. 3

Age-period-cohort influences on trends in preterm birth by parity: Guangzhou, China, 2001 to 2016. The left curve showed the fitted age-specific incidence at the reference cohort (1981), the middle curve was the risk ratios of cohorts relative to the reference cohort (1981), and the right curve was the risk ratios of period conditional on the estimated age and cohort effects

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BMC Public Health

ISSN: 1471-2458

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