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Table 1 Characteristics of Italian Studies evaluated for prevalence of ADHD

From: ADHD prevalence estimates in Italian children and adolescents: a methodological issue

First author (year of publication) Year of data collection Frame Age range or mean (yrs) Sample size Males in the study (%) Criteria RoB Score Studies using symptom-based questionnaires Studies with clinical-based diagnosis
Evaluation instrument Evaluation informant ADHD prevalence (%) CI 95% (binomial exact) Males/ Females ratio Impairment evaluation ADHD prevalence (%) CI 95% (binomial exact) Males/ Females ratio
O’Leary (1985) [26] NR School 6–8 344 54.1 DSM-III 5 CTRS T 12.2 8.9–16.1 6.7     
Gallucci (1993) [27] 1991 School 8–10 232 46.1 DSM-III-R 6 SQ T 3.9 1.8–7.2 7.2     
Camerini (1996) [28] 1995 School 6–12 2557 NR DSM-IV 2 CTRS, SQ T 5.0 4.2–6.0 7.6     
Marzocchi (2000) [29] 1995–1996 School 7–10 973 52.0 DSM-IV 5 CTRS, SDAI, DBD T 8.3 6.7–10.2 4.1     
Corbo (2003) [30] 1999 FP mean: 9.5 794 52.2 DSM-IV 4 CTRS, SQ P 2.4 1.5–3.7 NR NR 1.5 0.8–2.6 4.8
Ciotti (2003) [31] 2003 CANPS 7–14 Population 11,980 NR ICD-10 5       NR 1.1 0.9–1.3 3.1
Madeddu (2006) [32] 2001–2002 School 11–13 570 46.8 DSM-III-R 4 DICA-R C 16.7 13.7–20.0 0.9 Yes 1.2 0.5–2.5 1.5
Mugnaini (2006) [33] NR School 6.6–7.4 1891 50.5 DSM-IV 7 Modified VADTRS T 7.1 6.0–8.4 2.7     1.6
Zuddas (2006) [34] NR School 6–12 T: 1085 53.0 DSM-IV 5 DBD test T, P T: 8.6 7.0–10.4 1.8     
P: 1575 55.0 P: 2.5 1.8–3.4 1.4
   AR: 1.4 0.8–2.3 NR
Faravelli (2009) [35] NR School 6–11 999 50.6 DSM-IV 5 SQ T 5.6 4.3–7.2 2.3     
Maschietto (2012) [36] 2007–2010 CANPS 6–17 Population 24,028 NR DSM-IV 7       Yes 1.2 1.1–1.4 1.2
Bianchini (2013) [37] 2010–2011 School 5–14 6183 51.4 DSM-IV 6 SDAI T 7.3 6.7–8.0 3.5 Yes 3.1 2.7–3.5 5.7
Gritti (2014) [38] NR School 8–9 1390 45.0 DSM-IV 4 CTRS T 2.8 2.0–3.8 0.5     
Donfrancesco (2015) [39] 2002–2003 School 7–13 1887 49.0 DSM-IV 7 SDAG, SDAI T, P T: 4.6 3.6–5.5 7.2 Yes 1.3 0.9–2.0 9.7
  AR: 2.2 1.6–2.3 6.3
Zucchetti (2015) [40] NR School 8–10 334 48.2 DSM-IV 5 SDAI T 10.8 7.7–14.6 1.5     
  1. Note. AR “and rule” algorithm, C child, CANPS child and adolescent neuropsychiatric service, CTRS Conners’ Teacher Rating Scale, DBD Disruptive Behavior Disorder rating scale, DICA-R Diagnostic Interview for Child and Adolescent, FP family paediatrician, NR not reported, P parent, SDAG Attention and Hyperactivity Parent rating scale, SDAI Attention and Hyperactivity Teacher rating scale, SQ ad hoc study questionnaire, T teacher, VADTRS Vanderbilt Diagnostic Adhd Teacher Rating Scale