Table 1.

Deprivation adjusted incidence rate ratios for mental illnesses between first and final year of the study’s observation period by age group and gender

	Aged 6–9		Aged 10–12		Aged 13–16		Aged 17–19
	2003	2018	2003	2018	2003	2018	2003	2018
Female
Anxiety
Cases, n	153	624	209	1170	680	3626	1035	3158
Incidence rate	10	33	19	87	48	225	109	305
Incidence rate ratio	3.2		4.6		4.6		2.6
95% CI)	(2.6, 3.9)		(4.0, 5.3)		(4.1, 5.1)		(2.3, 3.0)
Depression
Cases, n	28	69	113	500	1155	3107	2274	3548
Incidence rate	1	4	10	36	81	189	245	343
Incidence rate ratio	1.9		3.6		2.1		1.3
(95% CI)	(1.2, 3.0)		(2.9, 4.4)		(1.9, 2.5)		(1.2, 1.5)
Eating disorders
Cases, n			60	96	196	416	161	204
Incidence rate			5	7	14	25	17	18
Incidence rate ratio			1.3		1.6		1.0
(95% CI)			(0.9, 1.8)		(1.2, 2.1)		(0.8, 1.3)
Male
Anxiety
Cases, n	149	565	228	878	380	1350	560	1797
Incidence rate	9	29	18	62	23	78	48	148
Incidence rate ratio	3.2		3.5		3.4		2.8
(95% CI)	(2.7, 3.8)		(2.9, 4.2)		(3.0, 3.9)		(2.3, 3.3)
Depression
Cases, n	46	92	100	336	439	1553	961	2428
Incidence rate	3	5	8	23	26	89	83	200
Incidence rate ratio	1.7		3.0		3.4		2.4
(95% CI)	(1.2, 2.4)		(2.4, 3.8)		(2.9, 3.8)		(2.2, 2.6)
Eating disorders
Cases, n			42	42	42	73	42	37
Incidence rate			3	3	2	4	3	3
Incidence rate ratio			0.8		1.7		0.9
(95% CI)			(0.5, 1.4)		(1.2, 2.4)		(0.6, 1.4)

Incidence rates are rounded to closest interger