Table 3.
Meteorological Variables Related to the Isolation of Human Metapneumovirus
| All hMPV Isolations | hMPV A2a | hMPV A2b | hMPV B1 | hMPV B2 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Meteorological Variables | (n = 1275)a | (n = 591)b | (n = 21)b | (n = 319)b | (n = 291)b | P Valuec | Difference Between Groups | |||||
| Mean temperature (°C) | 13.5 | (8.0–17.9) | 14.6 | (9.8–18.1) | 13.2 | (7.3–17.3) | 13.5 | (7.2–18.7) | 12.2 | (5.3–16.0) | .0003 | A2a > B2; B1 > B2 |
| Minimum temperature (°C) | 9.0 | (3.3–13.3) | 9.8 | (5.1–13.8) | 7.3 | (3.7–14.1) | 8.8 | (2.7–14.5) | 7.1 | (1.8–12.0) | .0001 | A2a > B2; B1 > B2 |
| Maximum temperature (°C) | 18.8 | (12.7–23.7) | 20.0 | (14.5–24.0) | 18.4 | (11.0–23.8) | 19.1 | (12.4–24.6) | 17.3 | (10.4–21.8) | .0006 | A2a > B2; B1 > B2 |
| Diurnal temperature variation (°C) | 9.9 | (7.4–11.6) | 10.1 | (7.4–11.8) | 10.4 | (8.1–12.3) | 9.7 | (7.4–11.5) | 9.7 | (7.5–11.8) | .5742 | |
| Ground surface temperature (°C) | 15.7 | (9.6–21.3) | 16.8 | (11.5–21.8) | 13.6 | (7.3–19) | 15.9 | (8.0–23.1) | 13.9 | (6.9–18.5) | <.0001 | A2a > B2; B1 > B2 |
| Rainfall (mm) | 0 | (0–0.4) | 0 | (0–0.2) | 0 | (0–1.0) | 0 | (0–0.5) | 0 | (0–0.5) | .7532 | |
| Wind speed (m/s) | 2.7 | (2.2–3.3) | 2.7 | (2.3–3.2) | 2.6 | (2.4–3.4) | 2.7 | (2.2–3.3) | 2.6 | (2.2–3.3) | .9524 | |
| Relative humidity (%) | 55.0 | (43.8–66.5) | 56.9 | (45.9–68.8) | 49.5 | (45.4–66.0) | 53.8 | (42.8–65.9) | 51.3 | (42.6–64.0) | .0015 | A2a > B1; A2a > B2 |
| Atmosphere pressure (mm Hg) | 1005.0 | (999.6–1009.2) | 1005.0 | (999.6–1008.7) | 1004.0 | (1000.3–1008.4) | 1004.0 | (998.1–1009.4) | 1005.0 | (1001.0–1009.8) | .1558 | |
| Sunshine duration (hour) | 13.3 | (12.4–14) | 13.4 | (12.5–14.1) | 13.4 | (11.7–13.8) | 13.3 | (12.3–14.1) | 13.2 | (12.1–13.7) | .0790 | |
Data are shown as median with interquartile range.
Abbreviation: hMPV, human metapneumovirus.
aSeventy-six hMPV infections of undetermined genotype were included.
bMixed-genotype hMPV infections were counted for each of the corresponding hMPV genotype isolations.
c P values were calculated by Kruskal-Wallis test, and post hoc analyses were performed by Dunn test to determine differences between groups.