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Table 2 Selected explanatory variables for modeling influenza-like illness visits in different areas of Taiwan using daily visits in 2004 – 2007

From: Detection of influenza-like illness aberrations by directly monitoring Pearson residuals of fitted negative binomial regression models

Outpatient Emergency department
Northern Taiwan
Selected Variables β p-value β p-value
Monday 0.14 <0.01 0.12 <0.01
Saturday - - 0.23 <0.01
Sunday −0.59 <0.01 0.95 <0.01
Chinese New Year −1.66 <0.01 1.32 <0.01
Other national holidays −0.35 <0.01 0.58 <0.01
Typhoon day −0.89 <0.01 0.48 <0.01
After day off 0.17 0.01 - -
Seasonal term 1.0 × 10−3 <0.01 0.07 <0.01
Temp. drop (≤14°C) 0.12 0.01 0.1 0.03
Visits a week ago 1.5 × 10−3 <0.01 0.05 <0.01
Central Taiwan
Monday 0.16 <0.01 - -
Saturday - - 0.23 <0.01
Sunday −0.62 <0.01 0.67 <0.01
Chinese New Year −1.29 <0.01 1.12 <0.01
Other national holidays −0.24 <0.01 0.16 0.02
Typhoon day −0.66 <0.01 - -
Seasonal term 0.7 × 10−3 0.01 0.04 <0.01
Temp. drop (≤14°C) 0.13 0.02   
Visits a week ago 1.4 × 10−3 <0.01 0.04 <0.01
Southern Taiwan
Monday 0.19 <0.01 0.08 <0.01
Saturday - - 0.21 <0.01
Sunday −0.73 <0.01 0.86 <0.01
Chinese New Year −1.18 <0.01 1.39 <0.01
Other national holidays −0.32 <0.01 0.44 <0.01
Typhoon day −0.83 <0.01 0.32 0.04
Seasonal term 2.2 × 10−3 <0.01 0.13 <0.01
Visits a week ago 1.0 × 10−3 <0.01 0.05 <0.01
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