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. 2020 Mar 19;2020(3):CD012517. doi: 10.1002/14651858.CD012517.pub2

Summary of findings for the main comparison. HC (13.5 mg/m²/day to 15.5 mg/m²/day): high morning dose vs high evening dose for treating CAH.

HC (13.5 mg/m²/day to 15.5 mg/m²/day) high morning dose compared with high evening dose for treating CAH
Patient or population: people with CAH
Settings: outpatients, tertiary centre
Intervention: HC (13.5 mg/m²/day to 15.5 mg/m²/day): 50% daily dose in the morning followed by 25% at noon and 25% in the evening
Comparison: HC (13.5 mg/m²/day to 15.5 mg/m²/day): 25% daily dose in the morning and 25% at noon followed by 50% in the evening
Outcomes Illustrative comparative risks* (95% CI) Relative effect
 (95% CI) No of participants
 (trials) Quality of the evidence
 (GRADE) Comments
Assumed risk Corresponding risk
High evening dose High morning dose
QoL
Follow‐up: 4 weeks
Outcome not reported. NA NA NA  
Androgen normalisation
Follow‐up: 4 weeks
See comments NA 15
(1 cross‐over trial)
⊕⊝⊝⊝a,b,cvery low 17 OHP (nmol/L)
Results for 17 OHP are presented as medians (IQR); 44 (16 to 116) for the high morning dose compared to 33 (15 to 76) for the high evening dose.
Androstenedione (nmol/L)
Results for androstenedione are presented as medians (IQR); 1.80 (1.0 to 3.0) for the high morning dose compared to 1.90 (1.20 to 6.50) for the high evening dose.
Testosterone (nmol/L)
Results for testosterone are presented as medians (IQR); 0.70 (0.30 to 2.30) for the high morning dose compared to 1.1 (0.60 to 2.70) for the high evening dose.
DHEAS (nmol/L)
Results for DHEAS are presented as medians (IQR); 0.20 (0.20 to 0.60) for the high morning dose compared to 0.40 (0.20 to 0.70) for the high evening dose.
Prevention of adrenal crisis
Follow‐up: 4 weeks
Outcome not reported. NA NA NA  
Presence of osteopenia
Follow‐up: 4 weeks
Outcome not reported. NA NA NA  
Presence of testicular or ovarian adrenal rest tumours
Follow‐up: 4 weeks
Outcome not reported. NA NA NA  
Subfertility
Follow‐up: 4 weeks
Outcome not reported. NA NA NA  
Final adult height
Follow‐up: 4 weeks
Outcome not reported NA NA NA  
*The basis for the assumed risk (e.g. the median control group risk across trials) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
 17 OHP: 17‐hydroxyprogesterone; CAH: congenital adrenal hyperplasia; CI: confidence interval; DHEAS: dehydroepiandrosterone sulphate; HC: hydrocortisone; IQR: interquartile range; NA: not applicable; QoL: quality of life.
GRADE Working Group grades of evidence
 High quality: further research is very unlikely to change our confidence in the estimate of effect.
 Moderate quality: further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
 Low quality: further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
 Very low quality: we are very uncertain about the estimate.

a Downgraded once for high risk of bias due to incomplete outcome data and selective reporting.
 b Downgraded once due to potential risk of bias: unclear details related to methodological design.
 c Downgraded due to uncertainty: small sample size and wide IQR.