Table 3.
Comparison between group I (days with primary spontaneous pneumothorax, PSP) and group II (days without PDP) for different meteorological parameters.
| Variable | Group I (n = 281) | Group II (n = 4102) | P-value |
| Temperature (degrees C): | |||
| Minimum | 21.8 ± 7 | 21.5 ± 7.4 | 0.584 |
| Average | 25.7 ± 7.1 | 25.6 ± 8 | 0.972 |
| Maximum | 34.2 ± 8.5 | 34.3 ± 8.9 | 0.845 |
| Humidity (%): | |||
| Minimum | 23.5± 13.9 | 23.1 ± 20 | 0.632 |
| Average | 49.1 ± 14.1 | 47.4 ± 17 | 0.07 |
| Maximum | 73.4 ± 19.9 | 72.4 ± 19.9 | 0.403 |
| Atmospheric pressure (hPa): | |||
| Minimum | 1005.9 ± 8.5 | 1005.9 ± 8.3 | 0.906 |
| Average | 1008.8 ± 7.4 | 1008.1 ± 8.1 | 0.149 |
| Maximum | 1009.8 ± 7.8 | 1009.8 ± 8.2 | 0.983 |
| Wind speed (km/h): | |||
| Minimum | 2.4 ± 14.1 | 3.3 ± 11.6 | 0.295 |
| Average | 13.9 ± 5.6 | 14 ± 5.4 | 0.611 |
| Maximum | 28.9 ± 16.9 | 28.5 ± 16.8 | 0.693 |