Comparison · NCT00462306-41296a66
Pregnant Women vs Non-Pregnant Women: Positive Berlin Questionnaire Indicative of Sleep Disordered Breathing
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
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ConductScience Library. Pregnant Women vs Non-Pregnant Women: Positive Berlin Questionnaire Indicative of Sleep Disordered Breathing. Trial comparisons, record NCT00462306-41296a66. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT00462306-41296a66
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Measures6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note |
|---|---|---|---|---|---|
| Risk in group 1 | 0.33 | 0.315 | 0.344 | wilson | |
| Risk in group 2 | 0.191 | 0.159 | 0.227 | wilson | |
| Risk difference, group 1 minus group 2 | 0.139 | 0.0995 | 0.174 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 1.73 | 1.44 | 2.08 | log | |
| Odds ratio, group 1 over group 2 | 2.08 | 1.65 | 2.63 | log | |
| Number needed to treat, for one more participant with the outcome on Pregnant Women than on Non-Pregnant Women | 7.2 | 5.75 | 10.1 | from the risk difference interval |
Source ClinicalTrials.gov
Groups2
Neither group, or both, names a comparator, so the groups keep ClinicalTrials.gov's order.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Pregnant Women | 1,343 | 4,074 | OG000 | |
| Group 2 | Non-Pregnant Women | Non-pregnant women undergoing a surgical procedure | 96 | 503 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- Positive Berlin Questionnaire Indicative of Sleep Disordered Breathing
- Description
The Berlin Questionnaire consists of three categories designed to elicit information regarding snoring (category 1), daytime somnolence (category 2), and the presence of obesity and/or hypertension (category 3). Categories 1 and 2 are considered positive if 2 or more responses are positive category 3 is considered positive if 1 response is positive and/or the body mass index is greater than 30 kg per meter squared. A patient is considered to have a high likelihood of sleep disordered breathing if 2 or more categories are positive.
- Time frame
- 1-2 minutes
- Population
Pregnant Women presenting to Prentice Women's Hospital or non-pregnant women or childbearing age presenting for ambulatory surgery from 10/2005 to 9/2007 were selected randomly and asked to complete the survey.
Source ClinicalTrials.gov
Trial
- Title
- Incidence of Obstructive Sleep Apnea in Pregnancy
- NCT number
- NCT00462306
- Phases
- Conditions
- Obstructive Sleep Apnea, Pregnancy
- Interventions
- Survey: Berlin questionnaire
- Lead sponsor
- Northwestern University
- Results first posted
- 2011-05-25
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT00462306?tab=results
Source ClinicalTrials.gov
Source
- Release
- trial-comparisons-2026-03-23-0.1.0
- Release manifest SHA-256
- f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
- AACT copy
- 2026-03-23
- Tables read
- outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet
Source ClinicalTrials.gov
Sources 2
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.
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