Table 2 Seasonal weather report data from Oslo between 2012 and 2015.

From: Seasonal variations in presenting symptoms and signs of dry eye disease in Norway

 

Spring

Summer

Fall

Winter

P-value

Air temperature (°C)

6.4 ± 5.1

15.5 ± 1.8b

6.9 ± 4.6

− 2.3 ± 4.1b

< 0.001a

Relative air humidity (%)

68.1 ± 16.9c

68.7 ± 12.4

83.8 ± 8.0d

84.3 ± 9.6

< 0.001a

Hours of sunshine

5.9 ± 4.6

8.4 ± 5.0e

5.1 ± 3.8

1.6 ± 2.4e

< 0.001a

Wind speed (m/s)

2.9 ± 1.0

2.5 ± 0.5

3.0 ± 1.8f.

2.5 ± 1.3 g

< 0.001a

  1. aOne-way analysis of variance; bP < 0.001 compared to all other seasons (Tukey post hoc test); cP < 0.001 compared to all seasons except Spring (Tukey post hoc test); dP < 0.001 compared to all seasons except Winter (Tukey post hoc test); eP < 0.001 compared to all other seasons (Tukey post hoc test); fP < 0.05 compared to Summer and Winter; gP < 0.01 compared to Spring and Fall (Tukey post hoc test).
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