The purpose of the present study was to investigate whether criteria a
ssociated with assignment of asthma patients between general practice
(GP) care alone, integrated care (shared between GP care and hospital
clinic) or conventional specialist review could be identified, and whe
ther outcomes for these patients differed over the next 12 months. Sev
en hundred and sixty four patients with a diagnosis of asthma and prev
iously assigned to either integrated care or clinic care were reviewed
after 1 year and reassigned, These patients were then followed for an
other 12 months and clinical data were collected over this time. After
12 months in clinic care or integrated care, assignment to integrated
care was predicted by previous participation in integrated care (OR 2
.94), patient preference for integrated care (OR 3.7), no admission (O
R 1.56), fewer steroid courses during the previous year (OR 0.88) and
nonattendance at review (OR 0.43) in the previous 12 months, Patient d
ischarge to GP care was predicted by higher level of forced expiratory
volume in one second (FEV(1)) (OR 1.49), lower number of GP consultat
ions for troublesome asthma (OR 0.78), and nonattendance for review in
the preceding year (OR 2.15), In the following 12 months, the three g
roups of patients differed significantly in hospital admissions (Disch
arged=0.008; Integrated=0.12; Clinic=0.31), bronchodilators prescribed
(Discharged=8.5; Integrated=10.2; Clinic=13.9), GP consultations (Dis
charged=1.3; Integrated=3.0; Clinic=4.1) and oral steroid courses (Dis
charged=0.62; Integrated=1.7; Clinic=2.4). Patients assigned to integr
ated care, clinic care or discharged to general practice care form thr
ee distinct patient populations differing retrospectively and prospect
ively in morbidity and admission risk. In particular, patients assigne
d to integrated care fall midway in risk and morbidity between those d
ischarged or those retained in clinic care. These results suggest that
integrated care provides general practitioners with a system of manag
ement for asthma patients, for whom they do not wish frequent speciali
st review but who they do not believe can safely be discharged to gene
ral practice care only. (C)ERS Journals Ltd 1996.