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Table 3 Linear regression analysis for time from request to diagnosis (days) and characteristics of sample population

From: Waiting times for diagnosis of attention-deficit hyperactivity disorder in children and adolescents referred to Italian ADHD centers must be reduced

Parameter   Estimated waiting time (days)
[mean (CI 95%)]
p-value a
Intercept   18.4 (−38.5–75.2) 0.5264
Age at diagnosis 9–17 years vs 5–8 years 20.8 (10.0–31.5) 0.0001
Sex Female vs Male 1.8 (−12.8–16.4) 0.8092
Only child No vs Yes 5.2 (−7.0–17.5) 0.4022
Born abroad No vs Yes 0.6 (−30.4–31.6) 0.9701
Adopted No vs Yes 15.5 (−20.9–51.8) 0.4048
School repetear No vs Yes 2.5 (−25.8–30.8) 0.8634
Support teacher at school No vs Yes 4.3 (−14.3–22.9) 0.6508
Family history of ADHD Yes vs No 3.3 (−11.1–17.8) 0.6507
Born preterm or low weight No vs Yes 7.0 (−10.4–24.5) 0.4285
Motor delay No vs Yes 16.5 (−8.2–41.1) 0.1899
Language delay Yes vs No 15.8 (1.9–29.8) 0.0262
Referred by another CANPS No vs Yes 64.6 (52.6–76.6) < 0.0001
Required assessment path done in the Center Yes vs No 43.8 (32.9–54.7) < 0.0001
Optional evaluation done in the Center No vs Yes 5.3 (−6.1–16.8) 0.3612
Psychiatric disorders No vs Yes 8.8 (−7.0–24.7) 0.2750
Chronic medical diseases No vs Yes 28.5 (7.5–49.6) 0.0079
Center in the ATS of residence and the nearest
to the municipality of residence
Yes vs No 7.6 (−4.3–19.5) 0.2115
CGI-S score at diagnosis 1–4 vs 5–7 25.7 (11.0–40.4) 0.0006
  1. a. Generalized linear model (GLM). r-squared = 0.12
  2. CI Confidence interval, ADHD Attention-Deficit Hyperactivity Disorder, CANPS Child and Adolescent Neuropsychiatric Services, ATS Local health protection agencies, CGI-S Clinical Global Impression–Severity