Interinstitutional Variation of Caesarean Delivery Rates According to Indications in Selected Obstetric Populations: A Prospective Multicenter Study
Table 4
Descriptive analysis of study population by center.
Center
A
B
C
D
E
F
G
H
I
L
M
Overall
Deliveries,
1291
950
957
1791
1328
1642
1054
868
2745
579
2521
15726
MA, yrs*
31.8 ± 5.0
31.7 ± 5.4
31.2 ± 5.3
31.7 ± 5.4
31.3 ± 5.1
31.8 ± 5.0
31.1 ± 5.2
31.6 ± 5.2
32.3 ± 5.1
31.8 ± 5.1
31.8 ± 5.4
31.7 ± 5.2
GA, wks ± days
39 ± 1
39 ± 1
39 ± 1
38 ± 6
39 ± 2
39 ± 1
39 ± 0
39 ± 2
39 ± 0
39 ± 0
38 ± 4
39 ± 0
GA, wks-range**
26–42
32–42
33–42
26–42
34–42
29–42
24–42
28–42
24–42
33–42
21–42
21–42
BW, grams*
3324 ± 469
3276 ± 452
3337 ± 451
3277 ± 531
3362 ± 447
3325 ± 481
3321 ± 460
3315 ± 493
3301 ± 560
3310 ± 443
3256 ± 631
3304 ± 520
PMR, (%)†
1 (0.1)
0 (0)
1 (0.1)
8 (0.5)
3 (0.2)
4 (0.3)
2 (0.2)
1 (0.1)
15 (0.6)
0 (0)
16 (0.6)
51 (0.3)
CD rate, (%)
184 (14.3)
281 (29.6)
266 (27.8)
519 (29.0)
255 (19.2)
285 (17.4)
230 (21.8)
158 (18.2)
598 (21.8)
156 (26.9)
859 (34.1)
3791 (24.1)
CD, 95%
12.4–16.3
26.7–32.6
25.0–30.8
26.9–31.1
17.1–21.4
15.6–19.3
19.4–24.4
15.7–20.9
20.3–23.4
23.4–30.8
32.2–36.0
23.4–24.8
*ANOVA’s for all the variables; **Kruskal-Wallis’s ; -squared ; †Fisher exact test . MA: maternal age; GA: gestational age at delivery; Wks: weeks; BW: birthweight; PMR: perinatal mortality rate; CD: caesarean delivery; CI: confidence intervals. Maternal age, gestational age, and birthweight are expressed as mean ± standard deviation.
