Table 1 Sample size and study subject characteristics by region and survey month. Sample size (N) reported as number of individuals in each village for each monthly survey and total number of compounds (with compound defined as a collection of households centrally located around a main residence). Study subject characteristics reported as number and percentage of individuals out of total individuals in each monthly survey. Dashed lines indicate survey months where serological analysis was not conducted in the West Coast Region
| Â | July 2013 | December 2013 | April 2014 | December 2014 | Â |
|---|---|---|---|---|---|
West Coast Region (WCR) | |||||
 Sample size (N) | Individuals | Compounds | |||
 Besse | 400 | 387 | – | – | 69 |
 N’Demban | 134 | 137 | – | – | 24 |
 Subtotal WCR | 534 | 524 | – | – | 93 |
Gender, n (%) | |||||
 Male | 240 (46.5) | 226 (45.0) | – | – |  |
 Female | 276 (53.5) | 276 (55.0) | – | – |  |
Age category, n (%) | |||||
 < 5 years | 111 (21.4) | 104 (20.6) | – | – |  |
 5–15 years | 186 (35.9) | 194 (38.4) | – | – |  |
 > 15 years | 221 (42.7) | 207 (41.0) | – | – |  |
LLIN use 24 h, n (%) | 517 (96.8) | 490 (94.2) | – | – |  |
Upper River Region (URR) | |||||
 Sample size (N) | Individuals | Compounds | |||
 Njaiyal | 381 | 180 | 290 | 283 | 28 |
 Madina Samako | 397 | 448 | 509 | 454 | 43 |
 Subtotal URR | 778 | 628 | 799 | 737 | 71 |
Gender, n (%) | |||||
 Male | 371 (47.9) | 285 (45.7) | 392 (49.4) | 352 (47.9) |  |
 Female | 403 (52.1) | 339 (54.3) | 402 (50.6) | 383 (52.1) |  |
Age category, n (%) | |||||
 < 5 years | 164 (21.5) | 143 (23.3) | 183 (23.3) | 169 (23.5) |  |
 5–15 years | 260 (34.1) | 233 (37.9) | 294 (37.5) | 252 (35.0) |  |
 > 15 years | 338 (44.4) | 239 (38.9) | 308 (39.2) | 299 (41.5) |  |
LLIN use 24 h, n (%) | 278 (46.6) | 244 (41.8) | 278 (46.6) | 294 (44.0) |  |