Table 1.
Mean all-cause and ARI-related daily sickness absence rate among different staff types during different periods
| All-cause sickness absence rate (%, SD) | |||||
|---|---|---|---|---|---|
| Staff type | Pre-pandemic perioda | Pandemic periodb | All periods | ||
| Non-epidemic | Epidemicc | Containmentd | Mitigatione | ||
| Medical | 0.25 (0.22) | 0.37 (0.32) | 0.25 (0.22) | 0.59 (0.33) | 0.30 (0.27) |
| Nursing | 1.46 (0.37) | 1.51 (0.43) | 1.65 (0.33) | 1.96 (0.37) | 1.52 (0.41) |
| Allied Health | 0.71 (0.41) | 0.80 (0.43) | 1.16 (0.47) | 1.34 (0.53) | 0.79 (0.47) |
| Administrative | 0.92 (1.24) | 0.85 (1.17) | 0.32 (0.69) | 0.62 (0.94) | 0.87 (1.20) |
| Supporting | 1.12 (0.41) | 1.21 (0.45) | 1.63 (0.45) | 1.98 (0.51) | 1.22 (0.50) |
| Overall | 1.12 (0.32) | 1.20 (0.38) | 1.45 (0.35) | 1.77 (0.48) | 1.20 (0.39) |
| ARI-related sickness absence rate (%, SD) | |||||
| Staff type | Pre-pandemic period | Pandemic period | All periods | ||
| Non-epidemic | Epidemic | Containment | Mitigation | ||
| Medical | 0.006 (0.029) | 0.009 (0.038) | 0.052 (0.105) | 0.087 (0.111) | 0.015 (0.053) |
| Nursing | 0.33 (0.15) | 0.37 (0.16) | 0.32 (0.10) | 0.48 (0.20) | 0.35 (0.16) |
| Allied Health | 0.12 (0.16) | 0.14 (0.16) | 0.18 (0.20) | 0.28 (0.24) | 0.14 (0.17) |
| Administrative | 0.12 (0.44) | 0.10 (0.40) | 0.22 (0.58) | 0.24 (0.51) | 0.13 (0.45) |
| Supporting | 0.21 (0.14) | 0.27 (0.17) | 0.32 (0.17) | 0.49 (0.25) | 0.24 (0.18) |
| Overall | 0.23 (0.11) | 0.27 (0.13) | 0.28 (0.11) | 0.42 (0.18) | 0.25 (0.13) |
ARI, acute respiratory infections
aPre-pandemic period: from January 1, 2004 through April 30, 2009
bPandemic period: from May 1, 2009 to December 31, 2009
cEpidemic periods: any two or more consecutive weeks with ≥4 % of the annual number of positive influenza isolation from the virological reference laboratory in the Hong Kong West Cluster [14]
dContainment period: from May 1, 2009 to June 10, 2009, starting from the date that the WHO issued a global alert till the occurrence of the first untraceable local case of A(H1N1)pdm09 in Hong Kong
eMitigation period: from June 11, 2009 to December 31, 2009, starting from the occurrence of the first untraceable local case of A(H1N1)pdm09 in Hong Kong through to the end of the study period [15]