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Table 2 Comparison of average dengue incidence rates according to population size in the municipalities of Northeast Brazil, 2014–2017

From: Spatiotemporal dynamics, risk areas and social determinants of dengue in Northeastern Brazil, 2014–2017: an ecological study

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)
  1. a A case with ignored municipality
  2. b Kruskal–Wallis test; SD Standard deviation; IQR Interquartile range