Table 2 Prevalence of probable ADHD and subtypes symptoms by sex, school, origin and socio-economic status (90th percentile)
Combined | Inattention | Hyperactivity / Impulsivity | Totala | ||||||
|---|---|---|---|---|---|---|---|---|---|
Total N | % (N) | P Value | % (N) | P Value | % (N) | P Value | % (N) | P Value | |
Parents Prevalence | 4.3 (51) | < 0.01 | 9.1 (108) | < 0.01 | 10.5 (125) | < 0.01 | 23.9 (284) | < 0.01 | |
Teachers Prevalence | 2.0 (24) | 7.0 (83) | 3.9 (47) | 12.9 (154) | |||||
Prevalenceb | |||||||||
Age 4 to 6 | 1189 | 1.3 (15) | 2.6 (31) | 1.5 (18) | 5.4 (64) | ||||
Age, years | |||||||||
4 to 5 | 739 | 1.6 (12) | 0.15 | 3.5 (26) | 0.01 | 2.0 (15) | 0.06 | 7.2 (53) | < 0.01 |
6 | 450 | 0.7 (3) | 1.1 (5) | 0.7 (3) | 2.5 (11) | ||||
Sex | |||||||||
Boys | 614 | 1.3 (8) | 0.89 | 2.9 (18) | 0.47 | 1.3 (8) | 0.54 | 5.5 (34) | 0.89 |
Girls | 575 | 1.2 (7) | 2.3 (13) | 1.7 (10) | 5.2 (30) | ||||
School | |||||||||
Public | 1047 | 1.4 (15) | 0.15 | 2.9 (30) | 0.13 | 1.7 (18) | 0.12 | 6.0 (63) | 0.09 |
Private | 142 | 0.0 (0) | 0.7 (1) | 0.0 (0) | 0.7 (1) | ||||
Origin | |||||||||
Spanish | 1022 | 1.4 (14) | 0.41 | 2.5 (26) | 0.73 | 1.7 (17) | 0.30 | 5.6 (57) | 0.98 |
Foreign | 167 | 0.6 (1) | 3.0 (5) | 0.6 (1) | 4.2 (7) | ||||
Socio-economic status | |||||||||
Low | 346 | 2.6 (9) | 4.9 (17) | 2.9 (10) | 10.4 (36) | ||||
Middle | 538 | 0.6 (3) | 0.03 | 1.7 (9) | < 0.01 | 0.7 (4) | 0.04 | 3.0 (16) | < 0.01 |
High | 305 | 1.0 (3) | 1.6 (5) | 1.3 (4) | 3.9 (12) | ||||