- Effect of month on serum vitamin D level of residents in Molidawa Daur Autonomous Banner.
| Month | n (%) | Median (nmol/L) | Kruskal-Wallis test | |
|---|---|---|---|---|
| H | P-value | |||
| January¥ | 379 (7.6) | 45.25¥ | 354.9 | <0.001 |
| February* | 188 (3.8) | 39.7* | ||
| March‡ | 411 (8.3) | 43.6‡ | ||
| April§ | 365 (7.3) | 43.7§ | ||
| May† | 460 (9.2) | 41.5† | ||
| June†† | 401 (8.1) | 54.15*,†, ‡,§,†† | ||
| July | 498 (10.0) | 60.6*,†, ‡,§¥,** | ||
| August | 585 (11.7) | 66.3*,†,‡,§,¥,**,‡‡,§§ | ||
| September | 377 (7.6) | 66.3*,†,‡,§,¥,**,‡‡,§§ | ||
| October‡‡ | 432 (8.7) | 55.05*,†, ‡,§,¥, ‡‡ | ||
| November | 453 (9.1) | 56.4*,†,‡,§,¥,§§ | ||
| December** | 433 (8.7) | 51.1*,†,‡,§,** | ||
The labels *,†, ‡, §, ¥, **, ††, ‡‡, and §§ indicate that the distribution of median serum vitamin D in different months was significantly different after Bonferroni correction (p<0.05/66).