| Quality assessment | Stage of labour | Number of babies with defined FHR patterns | Number (percentage) of babies who died | Quality | |||||
|---|---|---|---|---|---|---|---|---|---|
| Number of studies | Design | Risk of bias | Inconsistency | Indirectness | Imprecision | ||||
| Sporadic accelerationsa (3 or more accelerations per 30-minute tracing) (women with no identified risk factors for adverse outcome) | |||||||||
|
1 study | Cohort | Serious1,2,3 | No serious inconsistency | Serious4 | No serious imprecision | First 30 minutes of tracing | 811 | n = 2 (0.2%) | Low |
| Sporadic accelerationsa (fewer than 3 accelerations per 30-minute tracing) (women with identified risk factors for adverse outcome) | |||||||||
|
1 study | Cohort | Serious1,2,3 | No serious inconsistency | Serious4 | No serious imprecision | First 30 minutes of tracing | 122 | n = 12 (9.8%) | Very low |
| Sporadic accelerationsa (3 or more accelerations per 30-minute tracing) (women with identified risk factors for adverse outcome) | |||||||||
|
1 study | Cohort | Serious1,2,3 | No serious inconsistency | Serious4 | No serious imprecision | First 30 minutes of tracing | 955 | n = 4 (0.4%) | Very low |
| Sporadic accelerationsa (fewer than 3 accelerations per 30-minute tracing) (women with no identified risk factors for adverse outcome) | |||||||||
|
1 study | Cohort | Serious1,2,3 | No serious inconsistency | Serious4 | No serious imprecision | First 30 minutes of tracing | 108 | n = 3 (2.8%) | Very low |
FHR fetal heart rate
Sporadic accelerations occur independently from uterine contractions
No exclusion criteria specified hence high risk of selection bias
Women’s demographic characteristics not reported
Unbalanced cohort; only 4% of adverse outcomes
High-risk population
From: Appendix I, GRADE tables
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