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Table 1 Frequency of newly notified tuberculosis cases in Japan, 2007–2015

From: Seasonality of newly notified pulmonary tuberculosis in Japan, 2007–2015

  All Spring Summer Fall Winter
n (%) N = 199,856 50,203 (25.1) 54,181 (27.1) 49,307 (24.7) 46,165 (23.1)
Gender
 Male 124,228 (62.2) 31,512 (62.8) 33,386 (61.6) 30,359 (61.6) 28,971 (62.8)
 Female 75,628 (37.8) 20,795 (38.4) 20,795 (38.4) 18,948 (38.4) 17,194 (37.2)
Age
  ≤ 4 y 302 (0.2) 81 (0.2) 78 (0.1) 74 (0.2) 69 (0.1)
 5–14 y 374 (0.2) 90 (0.2) 113 (0.2) 89 (0.2) 82 (0.2)
 15–24 y 7393 (3.7) 2122 (4.2) 2163 (4.0) 1660 (3.4) 1448 (3.1)
 25–44 y 30,714 (15.4) 7633 (15.2) 8618 (15.9) 7448 (15.1) 7015 (15.2)
 45–64 y 39,922 (20.0) 10.083 (20.1) 10,893 (20.1) 9595 (19.5) 9351 (20.3)
 65–74 y 33,467 (16.8) 8420 (16.8) 8833 (16.3) 8370 (17.0) 7844 (17.0)
  ≥ 75 y 87,310 (43.8) 21,254 (42.3) 23,542 (43.5) 22,182 (45.0) 20.332 (44.0)
  1. Month of each season was defined as spring (March–May), summer (June–August), fall (September–November), and winter (December–February) according to the definitions by the Japan Meteorological Agency [16]