Table 1 Sociodemographic and obstetrical characteristic of study population, distributed by length of surgery

Age

33.0 ± 5.4

33.6 ± 5.3

< 0.000

Education

< 12 years

217 (4.1%)

52 (5.0%)

0.188

Ethnicity

Jew

4721 (86.7%)

894 (84.0%)

0.019

Arab

722 (13.3%)

170 (16.0%)

Parity

Multipara 2–5^c

4150 (76.2%)

772 (72.6%)

0.010

GMP 6–9

1029 (18.9%)

232 (21.8%)

GGMP≥10

264 (4.9%)

60 (5.6%)

Interval from previous CD (months)^b

<  12 months

434 (16.3%)

89 (16.5%)

12–24

1027 (38.5%)

184 (34.1%)

0.139

>  24 months^c

1206 (45.2%)

266 (49.4%)

Number offetus

singleton

5204 (95.6%)

1032 (97%)

0.039

multiple pregnancy

239 (4.4%)

32 (3.0%)

Gestational week

term

4738 (87.1%)

838 (78.8%)

< 0.000

preterm < 37

704 (12.9%)

226 (21.2%)

Anesthesia

local

5246 (96.5%)

958 (90%)

< 0.000

general

188 (3.2%)

106 (10.0%)

Cesarean delivery

elective^c

3219 (59.1%)

548 (51.5%)

elective in labor

94 (1.7%)

20 (1.9%)

< 0.000

emergent

2126 (39.1%)

496 (46.6%)

Number of CD

2^c

3023 (55.5%)

467 (43.9%)

< 0.000

3–4

2040 (37.5%)

473 (44.5%)

≥5

380 (7.0%)

124 (11.7%)

Experience of surgeon

senior > 10 yrs. ^c

1709 (32.6%)

333(31.3%)

senior < 10 yrs.

430 (8.2%)

102 (9.6%)

0.289

resident

3111 (59.3%)

629 (59.1%)

Presence of a third surgeon in surgery

non-present

5443 (100%)

1052 (98.9%)

< 0.000

present

0 (0%)

12 (1.1%)

Fetal weight

macrosomia > 4000

354 (6.5%)

61 (5.7%)

AGA 2500–4000^c

4468 (82.3%)

856 (80.5%)

LBW 1500–2500

523 (9.6%)

120 (11.3%)

0.059

VLBW 1000–1500

60 (1.1%)

16 (1.5%)

ELBW < 1000

24 (0.4%)

10 (0.9%)