Research Article
Multichart Schemes for Detecting Changes in Disease Incidence
Table 3
ARLs with their SDRL (in bracket) for the EWMA chart and EWMA multichart with
.
| | Shifts in | | | | Average EWMA | | | | |
| | 1.00 | 201.51 (180.30) | 200.89 (198.31) | 199.37 (194.44) | 200.59 (191.02) | 201.30 (191.34) | | 1.25 | 51.92 (35.82) | 66.89 (63.94) | 76.04 (76.97) | 64.95 (58.91) | 54.83 (44.98) | | 1.50 | 27.19 (14.17) | 30.43 (27.86) | 35.04 (34.94) | 30.89 (25.66) | 25.93 (18.08) | | 1.75 | 18.47 (8.01) | 17.20 (14.83) | 19.79 (18.99) | 18.49 (13.94) | 16.22 (10.57) | | 2.00 | 14.05 (5.34) | 11.10 (8.85) | 12.25 (11.33) | 12.47 (8.51) | 11.30 (7.25) | | 2.25 | 11.39 (3.98) | 7.94 (5.98) | 8.47 (7.62) | 9.27 (5.86) | 8.57 (5.49) | | 2.50 | 9.69 (3.15) | 6.14 (4.36) | 6.34 (5.45) | 7.39 (4.32) | 6.74 (4.36) | | 2.75 | 8.41 (2.63) | 4.94 (3.15) | 4.90 (4.04) | 6.08 (3.27) | 5.49 (3.53) | | 3.00 | 7.48 (2.23) | 4.13 (2.58) | 3.97 (3.17) | 5.19 (2.66) | 4.59 (2.93) | | 3.25 | 6.74 (1.96) | 3.58 (2.16) | 3.31 (2.48) | 4.54 (2.20) | 3.97 (2.48) | | 3.50 | 6.13 (1.75) | 3.15 (1.81) | 2.88 (2.05) | 4.05 (1.87) | 3.42 (2.08) | | ETD | 12.837 | 11.091 | 12.121 | 12.016 | 10.454 | | ETDE | 16.147 | 15.550 | 17.299 | 16.332 | 14.106 |
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