Chapter 4 Results - etheses Repository

Figure 86 Plot of sensitivity against specificity including summary values of the absence of
fetal breathing movements in predicting spontaneous preterm birth within 7 days of testing in
women presenting with threatened preterm labour ................................................................149
Figure 87 Methodological quality of studies included in the systematic review of accuracy of
cervical length in predicting spontaneous preterm birth. Data presented as 100% stacked bars.
Figures in the stacks represent number of studies. .................................................................152
Figure 88 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement before 20 weeks’ gestation (listed in ascending order of thresholds of
abnormality) in predicting spontaneous preterm birth before 34 weeks’ gestation in
asymptomatic antenatal women .............................................................................................156
Figure 89 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement between 20 - 24 weeks’ gestation (listed in ascending order of thresholds of
abnormality) in predicting spontaneous preterm birth before 34 weeks’ gestation in
asymptomatic antenatal women .............................................................................................156
Figure 90 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement before 20 weeks’ gestation (listed in ascending order of thresholds of
abnormality) in predicting spontaneous preterm birth before 37 weeks’ gestation in
asymptomatic antenatal women .............................................................................................157
Figure 91 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement between 20 – 24 weeks’ gestation (listed in ascending order of thresholds of
abnormality) in predicting spontaneous preterm birth before 37 weeks’ gestation in
asymptomatic antenatal women .............................................................................................157
Figure 92 Forest plots of likelihood ratios (LR’s) for cervical funnelling between 20 – 24
weeks’ gestation in predicting spontaneous preterm birth stratified according to reference
standards (outcomes) in asymptomatic antenatal women ......................................................158
Figure 93 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement in predicting spontaneous preterm birth within 48 hours of testing in
symptomatic women with threatened preterm labour ............................................................158
Figure 94 Forest plots of likelihood ratios (LR’s) for cervical length measurement utilizing
commonly chosen threshold (15mm) in predicting spontaneous preterm birth within 7 days of
testing in symptomatic women with threatened preterm labour.............................................159
Figure 95 Forest plots of likelihood ratios (LR’s) for cervical length measurement utilizing
commonly chosen threshold (30mm) in predicting spontaneous preterm birth before 34
weeks’ gestation in symptomatic women with threatened preterm labour ............................159
Figure 96 Forest plots of likelihood ratios (LR’s) from ideal quality studies for cervical length
measurement in predicting spontaneous preterm birth before 37 weeks’ gestation in
symptomatic women with threatened preterm labour ............................................................160
Figure 97 Forest plots of likelihood ratios (LR’s) for cervical funnelling between 24 – 36
weeks’ gestation in predicting spontaneous preterm birth stratified according to reference
standards (outcomes) in symptomatic women with threatened preterm labour .....................160
Figure 98 Summary of methodological quality of studies included in the systematic review of
accuracy of rheobase testing in predicting spontaneous preterm birth. Data presented as 100%
stacked bars. Figures in the stacks represent number of studies ............................................163
Figure 99 Summary forest plots of likelihood ratios (LR’s) of various tests accuracy as a
predictor of spontaneous preterm birth in asymptomatic women stratified according to
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