Research Article

A Machine Learning-Based Study of the Effects of Air Pollution and Weather in Respiratory Disease Patients Visiting Emergency Departments

Table 2

Distribution of respiratory disease incidence in ED by year, month, season, and days of week N (%).

201520162017Total

Monthly
Jan13,550 (8.0)16,290 (8.1)15,822 (10.3)45,662 (8.7)
Feb23,776 (14.0)32,604 (16.1)8,741 (5.7)65,121 (12.4)
Mar18,944 (11.2)17,448 (8.6)11,737 (7.6)48,129 (9.2)
Apr16,223 (9.6)16,460 (8.1)14,267 (9.3)46,950 (8.9)
May16,851 (9.9)15,556 (7.7)14,842 (9.6)47,249 (9.0)
Jun9,032 (5.3)12,656 (6.3)11,223 (7.3)32,911 (6.3)
Jul7,451 (4.4)12,643 (6.3)10,915 (7.1)31,009 (5.9)
Aug11,301 (6.7)12,186 (6.0)9,563 (6.2)33,050 (6.3)
Sep13,456 (7.9)12,940 (6.4)9,564 (6.2)35,960 (6.8)
Oct11,224 (6.6)10,940 (5.4)12,513 (8.1)34,677 (6.6)
Nov11,492 (6.8)11,943 (5.9)10,310 (6.7)33,745 (6.4)
Dec16,238 (9.6)30,453 (15.1)24,431 (15.9)71,122 (13.5)

Seasonal
Spring (3–5)52,018 (30.7)49,464 (24.5)40,846 (26.5)142,328 (27.1)
Summer (6–8)27,784 (16.4)37,485 (18.5)31,701 (20.6)96,970 (18.4)
Autumn (9–11)36,172 (21.3)35,823 (17.7)32,387 (21.0)104,382 (19.9)
Winter (12–2)53,564 (31.6)79,347 (39.3)48,994 (31.8)181,905 (34.6)

Days of week
Sunday40,462 (23.9)49,179 (24.3)37,675 (24.5)127,316 (24.2)
Monday22,688 (13.4)28,708 (14.2)21,591 (14.0)72,987 (13.9)
Tuesday19,421 (11.5)24,952 (12.3)18,126 (11.8)62,499 (11.9)
Wednesday19,418 (11.5)22,903 (11.3)18,143 (11.8)60,464 (11.5)
Thursday20,458 (12.1)22,259 (11.0)17,360 (11.3)60,077 (11.4)
Friday20,642 (12.2)23,100 (11.4)18,006 (11.7)61,748 (11.7)
Saturday26,449 (15.6)31,018 (15.3)23,027 (15.0)80,494 (15.3)