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Table 1 Baseline characteristics for cases and controls

From: The prevalence and incidence, resource use and financial costs of treating people with attention deficit/hyperactivity disorder (ADHD) in the United Kingdom (1998 to 2010)

Age group

Parameter

Cases

References

All ages

N

3,229

7,429

Males, n (%)

2,759 (85%)

6,354 (86%)

Females, n (%)

470 (15%)

1,075 (14%)

Age, mean (sd), years

10.4 (5.9)

10.4 (6.1)

Aged 6 to 17 years at index date

N

2,873

6,598

Males, n (%)

2,487 (87%)

5,707 (86%)

Females, n (%)

386 (13%)

891 (14%)

Age, mean (sd), years

9.8 (2.8)

9.8 (2.8)

Aged ≥18 years at index date

N

141

300

Males, n (%)

86 (61%)

183 (61%)

Females, n (%)

55 (39%)

117 (39%)

Age, mean (sd), years

31.7 (10.7)

33.2 (12.3)