
Fetal loss

Preterm delivery


Covariates

Number of studies

Point estimate

95% CI

P value

Number of studies

Point estimate

95% CI

P value


Publication year

21

−0.045

(−0.130–0.040)

0.304

16

−0.055

(−0.153–0.043)

0.271

Mean age

16

−0.008

(−0.322–0.305)

0.957

13

0.013

(−0.188–0.214)

0.902

Mean GA

15

0.007

(−0.140–0.153)

0.93

13

−0.028

(−0.142–0.086)

0.633

Proportion of 1st

9

−0.02

(−0.102–0.062)

0.635

8

0.001

(−0.050–0.052)

0.97

Proportion of 2nd

9

0.003

(−0.080–0.060)

0.952

8

0.004

(−0.040–0.048)

0.849

Proportion of 3rd

9

0.012

(−0.054–0.347)

0.729

8

−0.005

(−0.042–0.033)

0.8

Proportion of CA

10

0.055

(−0.015–0.124)

0.123

7

−0.002

(−0.095–0.091)

0.969

Proportion of NA

13

0.009

(−0.057–0.281)

0.778

9

0.032

(−0.062–0.126)

0.499

 CI confidence interval; GA gestational age, CA complicated appendicitis, NA negative appendicitis