Independent variables | WHO DDDs/100 bed days | Hospital-adjusted DDDs/100 bed days | ||||
---|---|---|---|---|---|---|
All antibiotics | Broad-spectruma | All penicillinsb | All antibiotics | Broad-spectruma | All penicillinsb | |
Overall model, R 2 (adjusted R 2 ) | 0.49 (0.43) | 0.40 (0.33) | 0.55 (0.50) | 0.43 (0.37) | 0.36 (0.30) | 0.59 (0.54) |
Infect. disease ICD-10 main diag. (%) | ||||||
Regression coeff. (95% C.I.) | 5.35*** (2.33; 8.38) | 3.83*** (1.34; 6.33) | 2.86** (1.00; 4.71) | 1.56** (0.59; 2.54) | ||
Beta weight | 0.47 | 0.45 | 0.41 | 0.44 | ||
Increment in R2 | 0.0690 | 0.0633 | 0.0509 | 0.0606 | ||
Registered nurses per 100 beds | ||||||
Regression coeff. (95% C.I.) | 0.17*** (0.08; 0.26) | 0.10*** (0.04; 0.15) | 0.10** (0.04; 0.17) | 0.02* (0.001; 0.04) | 0.04** (0.02; 0.06) | |
Beta weight | 0.56 | 0.44 | 0.57 | 0.28 | 0.39 | |
Increment in R2 | 0.1141 | 0.0706 | 0.1163 | 0.0293 | 0.0548 | |
Hospital stay < 2 days (%) | ||||||
Regression coeff. (95% confidence interval (C.I.)) | 0.81* (0.04; 1.57) | 0.31* (0.05; 0.58) | 0.29* (0.04; 0.53) | |||
Beta weight | 0.29 | 0.38 | 0.40 | |||
Increment in R2 | 0.0422 | 0.0718 | 0.0829 | |||
University hospital (binary) | ||||||
Regression coeff. (95% C.I.) | −11.82** (−20.5; −3.2) | −2.65*** (−4.01; −1.29) | −8.22*** (−12.3; −4.1) | −2.72*** (−3.53; −1.91) | ||
Beta weight | −0.55 | −0.41 | −0.62 | −0.49 | ||
Increment in R2 | 0.1078 | 0.0607 | 0.1354 | 0.0868 | ||
Surgical DRG scper 100 beds | ||||||
Regression coeff. (95% C.I.) | 0.15* (0.01; 0.30) | 0.52* (0.06; 0.97) | ||||
Beta weight | 0.29 | 0.48 | ||||
Increment in R2 | 0.0222 | 0.0589 |