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. 2021 Apr 19;16(4):e0250150. doi: 10.1371/journal.pone.0250150

Table 3. Process outcomes.

Post v Pre SBL Full v no implementation *
Source Trusts Women Pre Post RRpost P RR P
Element 1 Smoking Cessation
Smoking at Delivery Women 19 2,085 - 10.1 - - 1.21 (0.67–2.19) 0.50
Smoking at Delivery Electronic Data 14 268,736 14.3 11.8 0.83 (0.80–0.86) <0.001 0.91 (0.44–1.86) 0.80
Offered CO test Women 19 1,870 - 70.1 - - 7.95 (5.17–12.23) <0.001
Referred to smoking cessation Women 19 311 - 60.1 - - 1.11 (0.41–2.98) 0.82
Ceased Smoking Women† 19 331 - 40.8 - - 0.70 (0.28–1.76) 0.42
Ceased Smoking Electronic Data 11 27,550 28.7 27.0 0.94 (0.87–1.01) 0.098 3.99 (0.80–19.99) 0.11
Smoked in Pregnancy Women 19 2,158 - 15.7 - - 1.15 (0.71–1.86) 0.55
Smoking at Booking Electronic Data 11 203,635 16.2 14.1 0.87 (0.84–0.90) <0.001 0.50 (0.25–1.02) 0.070
Element 2 Detection and Management of SGA fetus
SGA detected SGA Audit 17 636 33.8 53.7 1.59 (1.32–1.92) <0.001 1.16 (0.34–4.01) 0.79
Growth chart in records General Audit 18 720 - 97.8 - - 1.21 (0.17–8.80) 0.84
EFW plotted SGA Audit 17 636 24.7 75.7 3.06 (2.48–3.76) <0.001 38.24 (7.80–187.46) <0.001
EFW plotted correctly SGA Audit 17 582 99.2 99.1 1.00 (0.98–1.01) 0.80 Insufficient Data -
SFH plotted SGA Audit 17 636 35.5 47.8 1.35 (1.11–1.63) 0.002 5.07 (1.42–18.11) 0.005
Element 3 Fetal Movements
RFM leaflet received Women 19 1,735 - 74.4 - - 2.87 (1.98–4.17) <0.001
RFM checklist used RFM Audit 17 339 - 52.2 - - 0.44 (0.22–0.88) 0.010
Attendances for RFM Women 19 2,171 - 36.5 - - 0.95 (0.70–1.28) 0.70
Scan after RFM (any) RFM Audit 17 322 - 64.9 - - 0.54 (0.25–1.17) 0.080
Scan for RFM Women 19 793 - 29.4 - - 0.85 (0.49–1.46) 0.52
Heart Monitoring every RFM visit RFM Audit 17 339 - 97.3 - - 0.28 (0.03–2.82) 0.18
Heart Trace for RFM Women† 19 793 - 73.5 - - 0.81 (0.46–1.43) 0.42
Induced following RFM RFM Audit 17 338 - 54.7 - - 4.78 (2.29–9.95) <0.001
Element 4 Fetal Monitoring
Buddy and Sticker used General Audit 18 527 - 50.3 - - 33.00 (10.85–100.39) <0.001
Escalation Protocol used General Audit 18 224 - 98.7 - - Insufficient Data -

Columns show the data source, the number of Trusts and women providing data, the fitted pre and* post implementation rates (±2y from the SBL launch date), the post v pre risk ratio (with 95% CI and significance level) and the risk ratio associated with 100% implementation of the relevant SBL element.

* Adjusted for care level, IMD and calendar month.

†Women–refers to data obtained via the postnatal questionnaire of women undertaken in the postnatal period.