Table 4 Multiplicity of infection (MOI) per msp-1 or msp-2 and combined msp-1/msp-2 genotype, by study site, age group and parasite density group
Variable | No. isolates | No. genotypes | MOI (SD) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
msp-1 | msp-2 | msp-1 | msp-2 | msp- 1 | P-value* | msp- 2 | P-value* | msp-1/-2 | P-value* | ||
Overall | 221 | 164 | 1–4 | 1–3 | 1.64 (0.77) | – | 1.34 (0.57) | – | 2.28 (1.54) | – | |
By site | Â | Â | Â | Â | Â | Â | |||||
 Anjoma Ramartina (Fringes) | 67 | 55 | 1–3 | 1–2 | 1.51 (0.68) | 0.001 | 1.27 (0.45) | NS | 2.02 (1.18) | 0.04 | |
 Antanimbary (Tropical) | 80 | 54 | 1–3 | 1–3 | 1.50 (0.63) | 1.50 (0.69) | 2.25 (1.51) | ||||
 Tsaratanana (Equatorial) | 74 | 55 | 1–4 | 1–3 | 1.92 (0.90) | 1.25 (0.52) | 2.52 (1.81) | ||||
By age group | Â | Â | |||||||||
  < 5 years | 58 | 41 | 1–4 | 1–3 | 1.74 (0.81) | NS | 1.27 (0.50) | NS | 2.10 (1.08) | NS | |
 5–15 years | 108 | 86 | 1–4 | 1–3 | 1.68 (0.80) | 1.34 (0.58) | 2.35 (1.75) | ||||
  > 15 years | 55 | 37 | 1–3 | 1–3 | 1.47 (0.63) | 1.43 (0.60) | 2.34 (1.56) | ||||
By parasite density group | Â | Â | Â | Â | Â | Â | |||||
  < 5000 | 48 | 39 | 1–3 | 1–2 | 1.50 (0.65) | NS | 1.23 (0.43) | NS | 1.90 (1.07) | NS | |
 5000–50,000 | 115 | 84 | 1–3 | 1–3 | 1.63 (0.80) | 1.39 (0.64) | 2.4 (1.78) | ||||
  > 50,000 | 57 | 39 | 1–4 | 1–3 | 1.77 (0.80) | 1.33 (0.53) | 2.33 (1.37) | ||||