Incidence, temporal trends and risk factors of puerperal infection in Mainland China: a meta-analysis of epidemiological studies from recent decade (2010–2020)

Table 2 Effects of study characteristics on the pooled incidence of PI

Study characteristics	Incidence (95% CIs)	Meta-regression
Study characteristics	Incidence (95% CIs)	b coefficient	P value
Sample size
≤ 1000	5.38% (4.29%, 6.47%)	-0.013	0.176
> 1000	4.51% (4.14%, 4.88%)	-0.013	0.176
Hospital levels
Secondary hospital	4.68% (3.37%, 5.96%)	-0.006	0.783
Tertiary hospital	4.97% (3.09%, 7.35%)	-0.006	0.783
Median year of data collection
2010–2014	4.71% (3.59%, 5.83%)	0.009	0.545
2015–2017	5.33% (4.59%, 6.06%)
2018–2020	5.59% (3.76%, 7.42%)
JBI scores
1–4	8.94% (4.29%, 15.24%)	-0.021	0.009
5–6	5.33% (3.17%, 8.00%)
≥ 7	4.58% (3.45%, 5.86%)

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