Table 1 Clinical characteristics of patients
|  | Recurrence n = 95 | Non-recurrence n = 876 | P-value | OR (95%CI) |
|---|---|---|---|---|
Demographic | ||||
 Age | 17.5 (1–61) | 20 (1–91) | 0.124a | NA |
 Age groups (years) |  |  | 0.199b | NA |
   < 5 | 4 (4.3%) | 67 (7.7%) |  |  |
  5–20 | 50 (53.2%) | 373 (42.6%) |  |  |
  21–40 | 26 (27.7%) | 270 (30.9%) |  |  |
  41–60 | 13 (13.8%) | 128 (14.6%) |  |  |
   > 60 | 1 (1.1%) | 37 (4.2%) |  |  |
 Male/Female, n (%) | 70 (73.3%)/25 (26.3%) | 539 (61.5%)/337 (38.5%) | 0.02b | 1.75 (1.09–2.82) |
 Thai/Non-Thai,n (%) | 66 (69.5%)/29 (30.5%) | 498 (56.8%), 378 (43.2%) | 0.018b | 1.727 (1.09–2.73) |
 House location |  |  | 0.959b | NA |
  - Khirirat | 2 (2.1%) | 26 (3%) |  |  |
  - Chong Khaep | 9 (9.5%) | 123 (14%) |  |  |
  - Phop Phra | 31 (32.6%) | 304 (34.7%) |  |  |
  - Mahawan | 0 | 2 (0.2%) |  |  |
  - Maeku | 0 | 2 (0.2%) |  |  |
  - Maejan | 0 | 2 (0.2%) |  |  |
  - Mogro | 0 | 4 (0.5%) |  |  |
  - Ruam Thai Phatthana | 8 (8.4%) | 75 (8.6%) |  |  |
  - Wow Lay | 45 (47.4%) | 335 (38.2%) |  |  |
  - Nong Ya Sai | 0 | 1 (0.1%) |  |  |
  - Na Bot | 0 | 1 (0.1%) |  |  |
  - Piang Luang | 0 | 1 (0.1%) |  |  |
 Year (cases, percent) |  |  | 0.425 | NA |
 2012 (306, 31.4%) | 36 (11.8%) | 270 (88.2%) |  |  |
 2013 (204, 20.9%) | 24 (11.8%) | 180 (88.2%) |  |  |
 2014 (132, 13.6%) | 9 (6.9%) | 123 (93.1%) |  |  |
 2015 (120, 12.3%) | 12 (10%) | 108 (90%) |  |  |
 2016 (81, 8.3%) | 6 (7.4%) | 75 (92.6%) |  |  |
 2017 (59, 6.1%) | 4 (7%) | 53 (93%) |  |  |
 2018 (71, 7.3%) | 4 (5.6%) | 67 (94.4%) |  |  |
 Case admission | 68 (10.4%) | 585 (89.6%) | 0.344b | 1.25 |
  - OPD | 27 (8.5%) | 291 (91.5%) |  | (0.78- |
  - Admit |  |  |  | 1.99) |
 Days of fever (mean ± SD) | 3.47 ± 1.92 | 3.83 ± 2.30 | 0.118b | NA |
 Chill (yes/no) | 43 (45.7%)/51 (54.3%) | 370 (42.2%)/506 (57.8%) | 0.513b | 1.15 (0.75–1.77) |
 Snot (yes/no) | 21 (22.3%)/73 (77.7%) | 173 (19.7%)/703 (80.3%) | 0.551b | 1.17 (0.7–1.95) |
 Headache (yes/no) | 59 (62.8%)/35 (37.2%) | 444 (50.7%)/432 (49.3%) | 0.026b | 1.64 (1.06–2.54) |
 Pain (yes/no) | 17 (18.1%)/77 (81.9%) | 190 (21.7%)/686 (78.3%) | 0.418b | 0.418 (0.8–1.38) |
 Type of Plasmodium spp. (Pf/Pv) | 32 (33.7%)/63 (66.3%) | 212 (24.2%)/663 (75.8%) | 0.044b | 1.59 (1.01–2.49) |
 Parasite density |  |  | 0.915b |  |
  - Rare | 8 (9.2%) | 79 (90.8%) |  |  |
  - Few | 48 (9.8%) | 443 (90.2%) |  |  |
  - Moderate | 35 (36.8%) | 302 (34.6%) |  |  |
  - Many | 4 (10.4%) | 50 (89.6%) |  |  |
 Career |  |  | 0.001b | NA |
  - Student | 41 (15.5%) | 223 (84.5%) |  |  |
  - Custody | 7 (6.7%) | 98 (93.3%) |  |  |
  - Farmer | 31 (10.1%) | 275 (89.9%) |  |  |
  - Self employed | 15 (5.7%) | 249 (94.3%) |  |  |
  - Others | 1 (3.1%) | 31 (96.9%) |  |  |