Research Article
Multichart Schemes for Detecting Changes in Disease Incidence
Table 1
ARLs with their SDRL (in bracket) for the CUSUM and multi-CUSUM chart with
.
| | Shifts in | | | | Average CUSUM | | | | |
| | 1.00 | 202.53 (192.35) | 204.21 (203.3) | 203.86 (202.29) | 203.53 (199.31) | 200.91 (194.15) | | 1.25 | 45.44 (37.36) | 51.29 (46.61) | 58.45 (56.17) | 51.73 (46.71) | 48.11 (41.63) | | 1.50 | 20.64 (14.18) | 21.77 (18.01) | 24.25 (21.58) | 22.22 (17.92) | 20.90 (15.07) | | 1.75 | 12.79 (8.96) | 12.67 (8.70) | 13.50 (10.94) | 12.99 (9.53) | 12.61 (7.75) | | 2.00 | 9.17 (6.71) | 8.71 (4.92) | 8.95 (5.62) | 8.94 (5.75) | 8.85 (5.44) | | 2.25 | 7.26 (4.05) | 6.59 (3.89) | 6.71 (3.65) | 6.85 (3.86) | 6.74 (3.98) | | 2.50 | 6.03 (3.08) | 5.41 (2.98) | 5.25 (2.91) | 5.56 (2.99) | 5.47 (3.01) | | 2.75 | 5.15 (2.55) | 4.51 (2.37) | 4.29 (2.31) | 4.65 (2.41) | 4.60 (2.50) | | 3.00 | 4.47 (2.12) | 3.93 (2.06) | 3.72 (1.94) | 4.04 (2.04) | 3.91 (1.98) | | 3.25 | 4.01 (1.77) | 3.51 (1.73) | 3.27 (1.64) | 3.60 (1.71) | 3.45 (1.69) | | 3.50 | 3.59 (1.49) | 3.15 (1.44) | 2.92 (1.41) | 3.22 (1.45) | 3.07 (1.42) | | ETD | 8.971 | 8.898 | 9.389 | 9.086 | 8.692 | | ETDE | 11.855 | 12.154 | 13.131 | 12.380 | 11.771 |
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