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)

Mean temperature °C

−6.76 ± 5.60

−7.51 ± 5.54

−9.17 ± 5.96^a

Max temp decline °C

5.09 ± 3.26

1.29 ± 4.95

4.75 ± 3.79^b

Temperature level preceding the decline

−3.5 ± 5.46

−6.58 ± 6.44

−5.19 ± 5.68^a

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 ± 0.54^b

AH level preceding the decline

3.59 ± 1.6

3.13 ± 2.02

2.81 ± 0.75