HERALD (Health Economics using Routine Anonymised Linked Data)

Table 4 Presence of Parent Diagnosis Read Codes for the AS Patients

Parent Read Code	Disease Group	Retrospective				Prospective
		10 year (n = 183)	5 year (n = 164)	1 year (n = 147)	3 months (n = 120)	3 months (n = 103)
A	Infectious/parasitic diseases	49	35	15	5	1
B	Neoplasms	26	16	1	0	0
C	Endocr/nutr/metabolic/immun.	42	26	7	0	0
D	Blood/blood forming organs	14	9	2	1	1
E	Mental disorders	35	26	10	4	0
F	Nervous system/sense organ	92	78	25	13	3
G	Circulatory system diseases	67	44	6	3	4
H	Respiratory system disorders	88	72	25	4	5
J	Digestive system disorders	81	47	14	6	7
K	Genitourinary system diseases	47	36	8	1	0
L	Pregnancy/childbirth/puerperium	1	0	0	0	0
M	Skin/subcutaneous tissue diseases	94	77	27	3	6
N	Musculoskeletal/connective tissue	149	110	36	9	11
P	Congenital anomalies	0	0	0	0	0
Q	Perinatal conditions	0	0	0	0	0
R	Symptoms, signs, ill-defined conditions	60	48	14	4	4
S	Injury and self poisoning	56	31	9	1	2
T	Causes of injury/poisoning	21	12	3	0	0
U	External causes morbdty/mortlty	2	1	0	0	0
Z	Unspecified conditions	29	22	5	3	1

Note: Baseline questionnaire completion is the reference date. The last column applies to the patients whose data in the GP system exist at least 3 months post questionnaire completion date

ISSN: 1472-6947