Table 4. Rate ratios for admissions in 1993-7, determined by Poisson regression. A ratio >1 indicates a higher rate in singlehanded practices Unadjusted rate ratio (95% CI) P value Adjusted rate ratio* (95% CI) P value Chronic care management   Asthma 1.23 (1.18 to 1.27) <0.0001 1.08 (1.03 to 1.12) 0.001 Epilepsy 1.23 (1.17 to 1.30) <0.0001 1.09 (1.03 to 1.16) 0.004 Diabetes 1.08 (1.03 to 1.14) <0.001 0.95 (0.90 to 1.00) 0.06 Avoidable admissions   Ear, nose, and throat infections 1.02 (0.97 to 1.08) 0.43 0.98 (0.92 to 1.04) 0.43 Urinary tract infection, renal abscess, and pyelonephritis 1.02 (0.98 to 1.07) 0.34 1.05 (1.00 to 1.11) 0.07 Congestive cardiac failure 1.10 (1.06 to 1.34) <0.0001 1.03 (0.99 to 1.08) 0.11 Inappropriate surgery   Grommet 0.96 (0.91 to 1.01) 0.13 0.98 (0.92 to 1.05) 0.64 Dilatation and curettage in women under 40 years 1.13 (1.05 to 1.21) 0.002 1.01 (0.92 to 1.10) 0.82 Health outcomes   Teenage pregnancies (age 13-19) 1.19 (1.13 to 1.25) <0.0001 1.03 (0.97 to 1.09) 0.38 * Adjusted for Townsend score, percentage of Asian and black residents, proportion of men and women over 75, rurality, presence of a female general practitioner, and training status. Denominator is number of women under 40 years. Denominator is number of female patients aged 13 to 19 years.