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Table 1 Descriptive characteristics of communities (at baseline) and children providing dried blood spots for serologic assessments (at 36 months)

From: Biannual versus annual mass azithromycin distribution and malaria seroepidemiology among preschool children in Niger: a sub-study of a cluster randomized trial

Study armBiannual azithromycinAnnual azithromycin
Community characteristics
 No. communities1212
 No. children/community, mean66 (range 36 to 124)72 (range 37 to 119)
 Proportion female,  % (95% CI)49.0% (45.1 to 52.9)52.1% (49.3 to 54.8)
 Age, months (95% CI)18.7 (17.4 to 19.9)18.4 (17.3 to 19.4)
Individual characteristics
 No. individuals531460
  Age, years  
   1113 (21%)99 (22%)
   2105 (20%)87 (19%)
   389 (17%)84 (18%)
   4113 (21%)86 (19%)
   5111 (21%)104 (23%)
 Female gender275 (52%)231 (50%)
 P. falciparum infection291 (55%)256 (56%)
 Clinically symptomatic P. falciparum infection plus fever33 (6%)36 (8%)
 P. falciparum parasite density, median (IQR)60 (0 to 1340)100 (0 to 2960)
 P. falciparum parasite density among children with infection, median (IQR)1100 (240 to 5815)2320 (470 to 8030)
 Haemoglobin, g/dL, median (IQR)9.5 (8.4 to 10.4)9.4 (8.2 to 10.5)
 MSP-119 seroprevalence333 (63%)316 (69%)