Table 3.
Number of cases, rates by 10,000 inhabitants and observed statistics of variation in procedures of low and high variability
| A: Low variability | ||||||
| Pacemaker | Appendectomy | Hip Fracture | ||||
| Estimate | CI | Estimate | CI | Estimate | CI | |
| ∑yi | 11973 | 28164 | 33851 | |||
| Rate | 3.77 | 8.90 | 10.57 | |||
| EQ | NC | -- | 20.61 | 3.20; 20.61 | 4.11 | 3.28; 4.11 |
| EQ5–95 | 3.15 | 2.49; 3.58 | 2.49 | 2.20; 2.74 | 2.37 | 2.00; 2.69 |
| CV | 0.38 | 0.33; 0.43 | 0.30 | 0.25; 0.34 | 0.26 | 0.24; 0.29 |
| CV5–95 | 0.27 | 0.24; 0.31 | 0.22 | 0.19; 0.25 | 0.21 | 0.19; 0.24 |
| CVw | 0.33 | 0.28; 0.38 | 0.30 | 0.25; 0.34 | 0.27 | 0.23; 0.31 |
| CVw5–95 | 0.26 | 0.23; 0.31 | 0.24 | 0.19; 0.26 | 0.21 | 0.19; 0.24 |
| SCV | 0.12 | 0.08; 0.16 | 0.11 | 0.08; 0.16 | 0.07 | 0.06; 0.08 |
| SCV5–95 | 0.05 | 0.04; 0.08 | 0.06 | 0.04; 0.08 | 0.04 | 0.03; 0.06 |
| EB | 0.13 | 0.08; 0.20 | 0.08 | 0.06; 0.10 | 0.07 | 0.05; 0.09 |
| χ2 | 1306.85 | 964.45;1711,39 | 2330.55 | 1710.91;3098.22 | 2394.66 | 1820.36;3017.15 |
| Bohning | 68.46 | 47.88; 92.28 | 136.98 | 93.89; 187.56 | 131.32 | 96.41; 167.70 |
| Dean | 67.44 | 40.11; 107.10 | 164.03 | 97.40; 246.83 | 132.92 | 80.47; 203.67 |
| B: Low variability | ||||||
| Lower Ext. Amput. | Hernia Repair | Knee replacement | ||||
| Estimate | CI | Estimate | CI | Estimate | CI | |
| ∑yi | 7022 | 21101 | 23257 | |||
| Rate | 2.23 | 6.67 | 7.39 | |||
| EQ | 25.59 | 7.04; 25.59 | NC | -- | 29.13 | 12.09; 29.14 |
| EQ5–95 | 4.11 | 3.54; 5.10 | 4.06 | 3.28; 4.90 | 5.61 | 4.39; 8.66 |
| CV | 0.42 | 0.36; 0.47 | 0.41 | 0.37; 0.45 | 0.49 | 0.44; 0.55 |
| CV5–95 | 0.33 | 0.27; 0.37 | 0.34 | 0.29; 0.37 | 0.39 | 0.33; 0.44 |
| CVw | 0.40 | 0.34; 0.46 | 0.41 | 0.35; 0.47 | 0.48 | 0.41; 0.54 |
| CVw5–95 | 0.31 | 0.27; 0.38 | 0.34 | 0.29; 0.38 | 0.39 | 0.32; 0.45 |
| SCV | 0.20 | 0.14; 0.28 | 0.17 | 0.13; 0.21 | 0.25 | 0.18; 0.32 |
| SCV5–95 | 0.13 | 0.07; 0.20 | 0.11 | 0.08; 0.13 | 0.14 | 0.10; 0.19 |
| EB | 0.17 | 0.12; 0.24 | 0.17 | 0.13; 0.22 | 0.27 | 0.19; 0.35 |
| χ2 | 1171.47 | 850.08;1534.95 | 3531.00 | 2723.57;4438.64 | 5164.25 | 3766.17;6898.34 |
| Bohning | 59.35 | 41.85; 78.83 | 195.84 | 146.27; 247.92 | 289.92 | 207.33; 384.14 |
| Dean | 54.57 | 32.13; 89.46 | 222.09 | 149.79; 314.23 | 275.13 | 170.29; 424.52 |
CI: Confidence interval; EQ: extremal quotient; CV: Coefficient of variation; CVw: weighted coefficient of variation; SCV: Systematic Component of Variance; EB: Empirical Bayes; Statistic with the subindex 5–95 have been estimated excluding the 5% of areas with rates under percentile 5 and over percentile 95 for each procedure; NC: Not Calculable.