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Table 1 Sample characteristic and ADHD-related symptoms among each wave

From: One-year trajectory analysis for ADHD symptoms and its associated factors in community-based children and adolescents in Taiwan

Variables/student report Wave 1 Wave 2 Wave 3 Wave 4
Total N = 1281
Gender, n (%)a
 Male 638 (50.9) 589 (50.5) 549 (48.9) 509 (48.3)
 Female 615 (49.1) 577 (49.5) 573 (51) 545 (51.7)
Grade, n (%)
 Grade 3 254 (20.3) 219 (18.8) 207 (18.4) 212 (20.1)
 Grade 5 281 (22.4) 273 (23.4) 270 (24) 249 (23.6)
 Grade 8 718 (57.3) 674 (57.8) 646 (57.5) 593 (56.3)
SDQ, mean (SD)
 Conduct problems 2.04 (1.19)    
 Hyperactivity 3.71 (1.35)    
 Emotional symptoms 2.00 (1.92)    
 Peer problems 4.43 (1.32)    
 Prosocial 7.45 (2.07)    
Family APGAR total score, mean (SD) 7.04 (2.97)    
SAICA, mean (SD)
 School function 13.95 (4.02)    
 Home behaviors 22.04 (6.60)    
ADHD-related symptoms (SNAP-IV), mean (SD)
 IA 6.90 (4.8) 6.41 (4.4) 6.11 (4.19) 6.19 (4.23)
 HI 3.58 (3.96) 3.36 (3.63) 3.10 (3.30) 3.17 (3.54)
 OD 4.8 (4.11) 4.57 (3.76) 4.2 (3.76) 4.01 (3.61)
  1. ADHD attention-deficit/hyperactivity disorder, IA inattention, HI hyperactivity–impulsivity, OD oppositional-defiance, SDQ Strengths and Difficulties Questionnaire, Family APGAR family adaptation, partnership, growth, affection, and resolve, SAICA social adjustment instrument for children and adolescents, SNAP-IV Swanson, Nolan, and Pelham
  2. a14 students with missing value in gender variable were found