Figures & data
Figure 1. Accelerations as defined in the study. (a) Sporadic accelerations, with a raise in basal heart line of at least 15 beats per minute, lasting for at least 15 s and occurring without relation to contractions. (b) Periodic accelerations, with a raise in basal heart line of at least 15 beats per minute, lasting for at least 15 s and occurring simultaneously with contractions. (c) No transient raises in basal heart line fulfilling the definition of accelerations.
Table 1. Occurrence of accelerations during the last CTG recording before birth in cases, and for controls at the same cervical dilation. Odds ratio for acidemia with 95% CI. Accelerations are defined as a transient raise in basal heart frequency of at least 15 bpm for at least 15 s.
Table 2a. Association between variability and acidemia. All traces (duration 30–30 min) included.
Table 2b. Association between acidemia at birth, variability in bpm and the presence of sporadic accelerations.
Table 3. Associations between the occurrence of at least two sporadic accelerations or not, and mode of monitoring, cervical dilatation, rupture of membranes, analgesia, and oxytocin administration in fetuses with umbilical cord arterial or venous pH ≥7.15 and Apgar scores 9–10 at 5 min. CTG traces of 30–60 min duration.