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

From: Prolonged operative time of repeat cesarean is a risk marker for post-operative maternal complications

  Length of cesarean surgerya  
≤ 90th percentile > 90thpercentile P value
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 2–5c 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 monthsc 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 electivec 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 2c 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 2500–4000c 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%)  
  1. GMP grand-multipara
  2. aThe 90th percentile was calculated individually for each surgeon
  3. bmissing data 3301 (50.7%)
  4. creference variable in the multivariate analysis