Fig. 2From: Trends, causes and solutions of maternal mortality in Jinan, China: the epidemiology of the MMR in 1991–2020Differences in the MMR between rural and urban areas in different periods. Differences between rural and urban areas in different periods were analyzed by Chi-square test. Significant differences were observed in 1991–2000 (P = 0.003) and 2011–2010(p = 0.005), but not in 2011–2020 (P = 0.378)Back to article page