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Table 1 Characteristics of the survey population in three districts

From: Submicroscopic malaria infection is not associated with fever in cross-sectional studies in Malawi

Characteristic Number of Participants
(Column  %)
Blantyre Chikhwawa Thyolo
Number 16650 5333 5830 5487
Female N (%) 10076 (60.5) 3337 (63.6) 3355 (57.6) 3384 (61.7)
Age, Median (IQR) 16650 (100) 13 (6–27) 12 (6–28) 13 (6–30)
Age group N (% of district)
 6 months–5 years 3893 (23.4) 1230 (23.1) 1455 (25.0) 1208 (22.0)
 6–15 years 5432 (32.6) 1648 (30.9) 1962 (33.7) 1822 (33.2)
 16 years and older 7325 (44.0) 2455 (46.0) 2413 (41.3) 2457 (44.8)
Season N (% of district)
 Dry season 8657 (52.0) 2748 (51.5) 3033 (52.0) 2876 (52.4)
 Rainy season 7993 (48.0) 2585 (48.5) 2797 (48.0) 2611(47.6)
SES quartilea N (% of district)
 Lowest 3881 (23.6) 174 (3.3) 1983 (34.5) 1724 (31.9)
 Low 4015 (24.4) 666 (12.6) 1847 (32.1) 1502 (27.8)
 Medium 4257 (25.9) 1321 (25.0) 1472 (25.6) 1464 (27.1)
 High 4298 (26.1) 3123 (59.1) 455 (7.9) 720 (13.3)
  1. IQR: interquartile range
  2. a SES missing 199 observations