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Table 2 Drivers of the diagnostic costs: multivariate analyses

From: Italian regional health service costs for diagnosis and 1-year treatment of ADHD in children and adolescents

Constant Coefficient CI 95% p*
378.55 (348.43–408.66) <0.0001
Center
 A 66.24 (48.05–84.42) <0.0001
 B 20.25 (2.42–38.08) 0.0260
 C 77.75 (59.81–95.69) <0.0001
 D 51.21 (30.99–71.42) <0.0001
 E 70.33 (48.53–92.12) <0.0001
 F 79.40 (58.18–100.62) <0.0001
 G 75.76 (55.44–96.108) <0.0001
 H 72.11 (54.92–89.31) <0.0001
 I 79.72 (58.63–100.8) <0.0001
 J 93.36 (75.5–111.22) <0.0001
 K 38.67 (15.63–61.71) 0.0010
 L   
 M 87.82 (13.78–161.86) 0.0201
 N 46.85 (25.86–67.84) <0.0001
 O 84.22 (67.35–101.09) <0.0001
 P 82.20 (61.25–103.15) <0.0001
 Q 59.44 (32.61–86.28) <0.0001
 R 77.65 (56.14–99.15) <0.0001
Gender
 Female 4.41 (−2.79 to 11.61) ns
 Male   
Age at diagnosis
 Years 0.70 (−1.14 to 2.54) ns
Scholarship
 Primary 6.71 (−3.66 to 17.08) ns
 Middle   
Scholar support
 Yes   
 None 9.56 (−0.84 to 19.97) ns
Sender
 GP 8.70 (−5.78 to 23.19) ns
 Relatives   
 School 9.47 (1.52–17.43) 0.0196
 Neuropsychiatric (private) 5.38 (−5.89 to 16.65) ns
 Neuropsychiatric (NHS) 5.65 (−8.08 to 19.38) ns
 CANS 5.11 (−3.77 to 14) ns
Familiar history of ADHD
 Positive 2.10 (−4.99 to 9.18) ns
 Negative   
Diagnosis of ADHD
 Yes 2.70 (−3.55 to 8.94) ns
 None   
Psychiatric concomitant disorders
 Yes   
 None 0.66 (−5.02 to 6.33) ns
CGIS
 <5 3.74 (−3.15 to 10.64) ns
 ≥5   
Time to diagnosis
 Working days 0.05 (0.02–0.09) 0.0033
  1. * Multivariate linear regression model