Table 3 Survey respondents’ perceptions of practices in relation to the timing of IOL – average and range (min-max) of responses between units
35 + 0 weeks onwards | 36 + 0 weeks onwards | 37 + 0 weeks onwards | 38 + 0 weeks onwards | 39 + 0 weeks onwards | 40 + 0 week onwards | 41 + 0 weeks onwards | Not a reason for IOLa | ||
|---|---|---|---|---|---|---|---|---|---|
Suspected macrosomia | Average | 0% | 1% | 8% | 30% | 36% | 13% | 1% | 11% |
Range | 0–0% | 0–10% | 0–25% | 13–44% | 21–66% | 0–25% | 0–2% | 0–25% | |
Request for IOL without medical indications | Average | 0% | 0% | 0% | 6% | 19% | 19% | 18% | 38% |
Range | 0–0% | 0–3% | 0–0% | 0–18% | 3–32% | 6–38% | 0–23% | 14–52% | |
Gestational diabetes that is diet controlled | Average | 0% | 0% | 1% | 10% | 19% | 37% | 19% | 13% |
Range | 0–0% | 0–3% | 0–7% | 0–26% | 10–38% | 32–69% | 0–45% | 0–23% | |
Gestational diabetes managed with oral hypoglycaemics (e.g. metformin) | Average | 0% | 0% | 1% | 22% | 36% | 33% | 3% | 5% |
Range | 0–0% | 0–3% | 0–7% | 3–46% | 29–56% | 18–55% | 0–7% | 0–5% | |
Insulin-requiring gestational diabetes (not pre-pregnancy Type I or II) | Average | 0% | 0% | 6% | 41% | 41% | 9% | 0% | 2% |
Range | 0–3% | 0–0% | 0–25% | 15–61% | 11–62% | 0–23% | 0–0% | 0–3% | |
Pre-pregnancy diabetes, Type I | Average | 0% | 0% | 17% | 47% | 26% | 8% | 0% | 2% |
Range | 0–3% | 0–0% | 0–46% | 23–63% | 7–46% | 0–15% | 0–0% | 0–8% | |
Pre-pregnancy diabetes, Type II | Average | 0% | 0% | 8% | 47% | 31% | 11% | 0% | 3% |
Range | 0–3% | 0–0% | 0–25% | 23–68% | 7–48% | 0–25% | 0–2% | 0–8% | |
Gestational hypertension (new-onset high blood pressure after 20 weeks, no preeclampsia) | Average | 0% | 0% | 14% | 33% | 30% | 16% | 2% | 5% |
Range | 0–0% | 0–3% | 5–29% | 23–44% | 21–38% | 4–23% | 0–4% | 0–0% | |
Chronic/essential hypertension | Average | 0% | 0% | 14% | 35% | 27% | 16% | 2% | 6% |
Range | 0–0% | 0–3% | 5–29% | 23–50% | 16–38% | 4–24% | 0–3% | 0–8% | |
Preeclampsia (assume no urgent indication for birth) | Average | 0% | 0% | 29% | 29% | 26% | 11% | 2% | 3% |
Range | 0–4% | 0–0% | 0–59% | 14–46% | 11–50% | 0–23% | 0–5% | 0–6% | |
Uncomplicated monochorionic diamniotic (MCDA) twin pregnancies (if vaginal birth is planned) | Average | 2% | 27% | 30% | 19% | 8% | 3% | 0% | 11% |
Range | 0–13% | 6–52% | 13–45% | 0–32% | 4–19% | 0–15% | 0–0% | 0–44% | |
Uncomplicated dichorionic diamniotic (DCDA) twin pregnancies (if vaginal birth is planned) | Average | 0% | 5% | 29% | 37% | 12% | 6% | 0% | 10% |
Range | 0–3% | 0–11% | 6–59% | 15–50% | 3–31% | 0–15% | 0–0% | 0–44% | |
Cholestasis of pregnancy | Average | 1% | 5% | 55% | 21% | 10% | 4% | 1% | 3% |
Range | 0–6% | 0–21% | 32–79% | 6–32% | 0–25% | 0–15% | 0–4% | 0–6% | |
Maternal age of 40 and over | Average | 0% | 0% | 5% | 11% | 37% | 43% | 0% | 5% |
Range | 0–0% | 0–0% | 0–16% | 6–25% | 23–63% | 18–62% | 0–0% | 0–16% | |
Substantially elevated BMI (> 40 kg/m2) | Average | 0% | 1% | 3% | 13% | 25% | 41% | 2% | 15% |
Range | 0–0% | 0–6% | 0–13% | 0–29% | 13–38% | 19–59% | 0–7% | 3–44% |