Table 1

Factors associated with IgG+IgA+IgM seroprevalence




P. falciparum IgG+IgA+IgM


n
negative
positive
P

Entire cohort

1,059
43.9%
56.1%

Sex
Sex ratio (male/female) = 0.59





Male
391
14.7%
22.2%
0.044

Female
668
29.2%
33.9%







Age
Mean age = 29.56 ± 17.66 years





< 15 years
251
12.9%
10.8%
< 0.0001

≥ 15 years
808
31.0%
45.3%







Social class
No schooling
49
2.2%
2.5%
NS

Primary school level
375
16.8%
18.6%


Secondary school level
519
20.3%
28.7%


Post-secondary studies
116
4.6%
6.3%







Travel outside city (previous 6 months)
No travel
761
33.4%
38.4%
0.021

Travel to Central Highlands
188
6.4%
11.3%


Travel to the coast
110
4.1%
6.3%







Malaria episodes (previous 6 months)
0 declared episodes, no treatment
875
36.5%
46.2%
NS

1 declared episode with treatment
134
5.7%
7.0%


More than 1 episode
50
1.8%
2.9%







Rice field index
Lower than 26.98%
785
29.6%
44.5%
< 0.0001

Higher than 26.99% (last quartile)
274
14.3%
11.6%


Subjects living in the city for more than 4 years and had not travelled outside the city in the previous 6 months
690
46.5%
53.5%

Sex
Sex ratio (male/female) = 0.49





Male
226
14.1%
18.7%
NS

Female
464
32.5%
34.8%







Age
Mean age = 30.25 ± 18.07 years





< 15 years
165
13.3%
10.6%
0.006

≥ 15 years
525
33.2%
42.9%







Rice field index
Lower than 26.98%
512
32.3%
41.9%
0.008

Higher than 26.99% (last quartile)
178
14.2%
11.6%


Domarle et al. Malaria Journal 2006 5:106   doi:10.1186/1475-2875-5-106