Table 3 Evolution of the indications of induction rates according to the Grenoble classification
Group of the Grenoble classification | 2014–2017 | 2018–2021 | ABSOLUTE DIFFERENCE | 95% CI | P value | RELATIVE DIFFERENCE | 95% CI | ||
|---|---|---|---|---|---|---|---|---|---|
N | % | N | % | % | % | ||||
Group 1: Multiple pregnancies | 281 | 1.4 | 318 | 1.6 | + 0.2 | [0.1 ; 0.3] | 0.03 | + 13.0 | [7.3 ; 19.2] |
Group 2: Single breech pregnancy | 36 | 0.2 | 62 | 0.3 | + 0.1 | [0.1 ; 0.2] | 0.01 | + 66.7 | [49.0 ; 83.0] |
Group 3: Preterm single cephalic pregnancy (term less than 37 weeks gestation) | 241 | 1.2 | 280 | 1.4 | + 0.2 | [0.1 ; 0.3] | 0.01 | + 16.1 | [8.0 ; 28.0] |
Group 4: Single cephalic pregnancy with prelabor rupture of membranes at term (37 weeks gestation and above) | 862 | 4.2 | 1087 | 5.3 | + 1.11 | [0.9 ; 1.3] | < 0.01 | + 26.3 | [9.0 ; 43.0] |
Group 5: Single cephalic pregnancy, late term and post term (41 weeks gestation and over), intact membranes | 1196 | 5.9 | 1329 | 6.5 | + 0.7 | [0.5 ; 0.8] | < 0.01 | + 11.4 | [5.0 ; 13.2] |
Group 6: Single cephalic pregnancy, term between 37 and 40 weeks, 6 days with maternal pathology indicating induction, intact membranes | 909 | 4.5 | 1039 | 5.1 | + 0.7 | [0.4 ; 0.9] | < 0.01 | + 14.6 | [10.3 ; 21.0] |
Group 7: Single cephalic pregnancy, term between 37 and 40weeks, 6days with fetal pathology indicating induction, intact membranes | 319 | 1.6 | 560 | 2.8 | + 1.2 | [0.9 ; 1.4] | < 0.01 | + 75.5 | [61.2 ; 90.1] |
Group 8: Single cephalic pregnancy, term between 37 and 40 weeks, 6 days, induced without medical indication, intact membranes | 274 | 1.3 | 314 | 1.5 | + 0.2 | [0.1 ; 0.3] | < 0.01 | + 14.9 | [6.0 ; 21.0] |
Total of induction rates | 4313 | 21.1 | 5210 | 25.5 | + 4.4 | [4.0 ; 4.8] | < 0.01 | + 20.9 | [15.5 ; 25.0] |