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Table 2 Deprivation adjusted incidence rate ratios for neurodevelopmental disorders between first and final year of the study’s observation period by age group

From: Temporal trends in annual incidence rates for psychiatric disorders and self-harm among children and adolescents in the UK, 2003–2018

 

Aged 1–5

Aged 6–9

Aged 10–12

Aged 13–16

Aged 17–19

2003

2018

2003

2018

2003

2018

2003

2018

2003

2018

Female

 ADHD

  Cases, n

28

24

80

252

32

117

20

106

a

34

  Incidence rate

2

1

5

13

3

9

1

6

0

3

  Incidence rate ratio

0.7

2.5

3.0

4.6

14.3

  (95% CI)

(0.4, 1.3)

(1.9, 3.2)

(2.0, 4.2)

(2.8, 7.4)

(3.4, 59.7)

 Autism

  Cases, n

90

372

31

302

17

192

12

187

8

43

  Incidence rate

5

17

2

16

2

14

1

11

1

4

  Incidence rate ratio

3.5

7.5

9.2

13.0

4.6

  (95% CI)

(2.8, 4.5)

(5.1, 11.1)

(5.6, 15.1)

(7.1, 23.9)

(2.2, 9.8)

Male

 ADHD

  Cases, n

153

110

454

987

233

431

129

351

20

76

  Incidence rate

8

5

27

50

18

31

8

20

2

6

  Incidence rate ratio

0.6

1.9

1.7

2.6

3.5

  (95% CI)

(0.5, 0.8)

(1.6, 2.2)

(1.4, 2.0)

(2.1, 3.3)

(2.1, 5.7)

 Autism

  Cases, n

379

1334

221

964

99

448

60

315

20

85

  Incidence rate

20

60

13

50

8

33

4

18

2

7

  Incidence rate ratio

3.2

3.8

4.5

5.1

4.0

  (95% CI)

(2.7, 3.8)

(3.2, 4.4)

(3.3, 5.3)

(3.7, 7.1)

(2.5, 6.5)

  1. Incidence rates are per 10,000 person years and were directly standardised for Index of Multiple Deprivation (IMD) quintile. Incidence rates are rounded to closest interger.
  2. a The CPRD stipulates that cell counts below 5 are masked to protect confidentiality