Table 2.
Comparison of average dengue incidence rates according to population size in the municipalities of Northeast Brazil, 2014–2017
| Population size | No. municipalities (%) | No. casesa (%) | Mean (± SD) | Median (IQR) | P-value |
|---|---|---|---|---|---|
| Small (up to 50 000) | 1610 (89.7) | 147 935 (29.0) | 143.21 ± 331.50 | 33.97 (122.50) | < 0.001b |
| Small 1 (up to 20 000) | 1157 (64.5) | 63 831 (12.5) | 136.84 ± 328.52 | 29.79 (109.40) | |
| Small 2 (20 001 to 50 000) | 453 (25.2) | 84 104 (16.5) | 159.47 ± 338.83 | 46.22 (145.73) | |
| Medium (50 001 to 100 000) | 122 (6.8) | 75 246 (14.8) | 229.25 ± 302.78 | 113.91 (307.69) | |
| Medium 1 (50 001 to 70 000) | 75 (4.2) | 40 559 (8.0) | 228.74 ± 327.89 | 70.95 (304.72) | |
| Medium 2 (70 001 to 100 000) | 47 (2.6) | 34 687 (6.8) | 230.06 ± 261.15 | 155.49 (318.76) | |
| Large (> 100 000) | 62 (3.5) | 286 079 (56.2) | 275.22 ± 463.23 | 144.89 (272.19) | |
| Large 1 (100 001 to 500 000) | 51 (2.8) | 113 407 (22.3) | 274.27 ± 501.79 | 139.92 (235.02) | |
| Large 2 (> 500 000) | 11 (0.7) | 172 672 (33.9) | 279.61 ± 223.50 | 201.81 (373.40) |
a A case with ignored municipality
b Kruskal–Wallis test; SD Standard deviation; IQR Interquartile range