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. 2023 Mar 27;2023(3):CD009885. doi: 10.1002/14651858.CD009885.pub3

Comparison 4. Additional subgroup analyses of ADHD symptoms.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
4.1 Parallel‐group trials and first‐period cross‐over trials: comparison of raters 46 7965 Std. Mean Difference (IV, Random, 95% CI) ‐0.73 [‐0.85, ‐0.60]
4.1.1 Teacher‐rated 21 1759 Std. Mean Difference (IV, Random, 95% CI) ‐0.75 [‐0.90, ‐0.60]
4.1.2 Independent assessor‐rated 20 3601 Std. Mean Difference (IV, Random, 95% CI) ‐0.88 [‐1.18, ‐0.58]
4.1.3 Parent‐rated 26 2605 Std. Mean Difference (IV, Random, 95% CI) ‐0.64 [‐0.77, ‐0.51]
4.2 Parallel‐group trials and first‐period cross‐over trials: age 13 2374 Std. Mean Difference (IV, Random, 95% CI) ‐0.93 [‐1.35, ‐0.50]
4.2.1 2 to 6 years 2 153 Std. Mean Difference (IV, Random, 95% CI) ‐0.50 [‐0.82, ‐0.18]
4.2.2 7 to 11 years 5 623 Std. Mean Difference (IV, Random, 95% CI) ‐1.77 [‐3.24, ‐0.29]
4.2.3 12 to 18 years 6 1598 Std. Mean Difference (IV, Random, 95% CI) ‐0.48 [‐0.77, ‐0.19]
4.3 Parallel‐group trials and first‐period cross‐over trials: comorbidity versus no comorbidity 29 3433 Std. Mean Difference (IV, Random, 95% CI) ‐0.69 [‐0.84, ‐0.54]
4.3.1 ADHD with comorbidity 20 2128 Std. Mean Difference (IV, Random, 95% CI) ‐0.67 [‐0.88, ‐0.47]
4.3.2 ADHD without comorbidity 9 1305 Std. Mean Difference (IV, Random, 95% CI) ‐0.73 [‐0.91, ‐0.54]
4.4 Parallel‐group trials and first‐period cross‐over trials: subtypes ADHD: ADHD Rating Scale (parent‐, teacher‐ or independent assessor‐rated) 2   Std. Mean Difference (IV, Random, 95% CI) Subtotals only
4.4.1 Combined ADHD 2 559 Std. Mean Difference (IV, Random, 95% CI) 0.65 [‐1.30, 2.60]
4.4.2 Inattentive ADHD 1 204 Std. Mean Difference (IV, Random, 95% CI) ‐1.31 [‐1.61, ‐1.01]
4.5 Cross‐over trials: first‐period data versus endpoint data (parent‐, independent assessor‐ and teacher‐rated) 4   Std. Mean Difference (IV, Random, 95% CI) Subtotals only
4.5.1 First‐period data 4 191 Std. Mean Difference (IV, Random, 95% CI) ‐0.64 [‐0.93, ‐0.34]
4.5.2 Endpoint data 4 372 Std. Mean Difference (IV, Random, 95% CI) ‐0.91 [‐1.18, ‐0.65]