In a large Denver HMO, a retrospective study of asthma management was reviewed. Seventy moderate to severe asthmatic patients' charts were reviewed through April 1994. All patients admitted to the study had to be followed for at least 1 year by a primary care physician before the allergy evaluation (AE) and for at least one year of followup (F/U) after the AE. All patients had at least two acute care (ER) visits and/or one hospitalization before the AE. All primary care, AE, and F/U were done by staff physicians in the Kaiser Permanente system. The findings included 1) Forty-five percent decrease (308 to 169) in the number of sick care office visits (P = 0.0001); 2) fifty-five percent decrease (266 to 118) in acute care visits (P = 0.0001); 3) sixty-seven percent decrease (34 to 11) in the number of hospitalizations after the AE (P = 0.001); 4) average hospital days before AE were four days and after AE, 2.5 days; 5) estimated cost saving of $145,500, or $2,100 per patient.

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