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Table 1 Mean temperature and AH, their maximal declines and level preceding the decline during the hazard period (n = 66) prior to the onset of influenza episodes and during the reference periods either seven days prior or after the visit to the clinic for influenza (day 0)

From: Decline in temperature and humidity increases the occurrence of influenza in cold climate

Parameter Hazard period Reference period (pre) Reference period (post)
Mean temperature °C −6.76 ± 5.60 −7.51 ± 5.54 −9.17 ± 5.96a
Max temp decline °C 5.09 ± 3.26 1.29 ± 4.95 4.75 ± 3.79b
Temperature level preceding the decline −3.5 ± 5.46 −6.58 ± 6.44 −5.19 ± 5.68a
Mean AH g/m3 3.09 ± 1.34 2.82 ± 1.67 2.57 ± 1.28
Max AH decline g/m3 1.18 ± 0.71 0.43 ± 0.96 0.68 ± 0.54b
AH level preceding the decline 3.59 ± 1.6 3.13 ± 2.02 2.81 ± 0.75
  1. Values represent mean ± SD.
  2. one-way ANOVA, ap < 0.05, b< 0.001.