Table 3.
Prevalence (N) of various psychiatric disorder groups among 6 years old according to DSM-IV and ICD-10 diagnostic classifications and socioeconomic status at birth
| Psychiatric disorders | Prevalence of psychiatric diagnoses by DSM-IV | Prevalence of psychiatric diagnoses by ICD-10 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wealth index, quintiles | Chi square | p value | Wealth index, quintiles | Chi square | p value | |||||||||
| 1st | 2nd | 3rd | 4th | 5th | 1st | 2nd | 3rd | 4th | 5th | |||||
| Any diagnosis | 14.7 (98) | 14.7 (111) | 15.1 (108) | 13.6 (101) | 8.1 (57) | 20.583 | <0.001 | 14.1 (94) | 14.3 (108) | 14.4 (103) | 13.0 (97) | 8.0 (56) | 18.611 | 0.001 |
| Any anxiety disorder | 9.9 (66) | 9.3 (70) | 9.9 (71) | 8.2 (61) | 6.7 (47) | 6.440 | 0.169 | 9.2 (61) | 9.1 (69) | 10.0 (72) | 8.1 (60) | 6.6 (46) | 6.379 | 0.173 |
| Any depressive disorder | 1.1 (7) | 1.9 (14) | 1.8 (13) | 1.2 (9) | 0.4 (3) | 7.889 | 0.096 | 1.1 (7) | 1.9 (14) | 1.8 (13) | 1.2 (9) | 0.4 (3) | 7.889 | 0.096 |
| Any ADHD disorders/hyperkinetic | 2.6 (17) | 2.9 (22) | 4.5 (32) | 2.3 (17) | 0.7 (5) | 20.294 | <0.001 | 2.7 (18) | 2.5 (19) | 3.2 (23) | 1.9 (14) | 0.7 (5) | 12.022 | 0.017 |
| Any oppositional/conduct disorder | 3.0 (20) | 4.0 (30) | 2.9 (21) | 2.6 (19) | 0.6 (4) | 17.574 | 0.001 | 2.7 (18) | 3.8 (29) | 2.9 (21) | 2.6 (19) | 0.6 (4) | 16.633 | 0.002 |
The 2004 Pelotas Birth Cohort (N = 3,585)
ADHD attention deficit hyperactivity disorder