Table 3 Proportion of multiclonal infections defined on the basis of msp-1 and msp-2 genotyping, by study site, age group and parasite density group
Variable | Multiclonal infections | ||||||
|---|---|---|---|---|---|---|---|
msp-1 | P-value* | msp-2 | P-value* | Combined msp-1 and msp-2 | P-value* | ||
Overall | 106/221 (48.0%) | – | 48/164 (29.3%) | – | 87/138 (63.0%) | – | |
By site | Â | Â | Â | ||||
 Anjoma Ramartina (Fringes) | 27/67 (40.3%) | 0.02 | 15/55 (27.3%) | NS | 25/43 (58.1%) | NS | |
 Antanimbary (Tropical) | 34/80 (42.5%) | 21/54 (38.9%) | 26/43 (60.5%) | ||||
 Tsaratanana (Equatorial) | 45/74 (60.8%) | 12/55 (21.8%) | 36/52 (69.2%) | ||||
By age group | Â | Â | Â | ||||
  < 5 years | 31/58 (53.4%) | NS | 10/41 (24.4%) | NS | 24/38 (63.2%) | NS | |
 5–15 years | 53/108 (49.1%) | 24/86 (27.9%) | 44/71 (62.0%) | ||||
  > 15 years | 22/55 (40.0%) | 14/37 (37.8%) | 19/29 (65.5%) | ||||
By parasite density group | Â | ||||||
  < 5000 | 20/48 (41.7%) | NS | 9/39 (23.1%) | NS | 19/31 (61.3%) | NS | |
 5000–50,000 | 54/115 (47.0%) | 26/84 (31.0%) | 44/70 (62.9%) | ||||
  > 50,000 | 31/57 (54.4%) | 12/39 (30.8%) | 23/36 (63.9%) | ||||