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Analysis of environmental factors for TB transmission by using the Kruskal-Wallis H test.
| TB case number | n | Mean rank | Chi-square statistic | p-value | |
|---|---|---|---|---|---|
| Population density | fewest | 9 | 8.56 | ||
| mid | 9 | 15 | 6.161 | 0. 046* | |
| most | 8 | 17.38 | |||
| PM2.5 | fewest | 9 | 12.56 | ||
| mid | 9 | 13.89 | 0.214 | 0.899 | |
| most | 8 | 14.13 | |||
| NO2 | fewest | 9 | 9.11 | ||
| mid | 9 | 15.61 | 4.549 | 0.103 | |
| most | 8 | 16.06 | |||
| CO | fewest | 9 | 11.56 | ||
| mid | 9 | 13.67 | 1.133 | 0.568 | |
| most | 8 | 15.50 |
*p < 0.05.
