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Table 1 Baseline characteristics of the study population and their association with malaria infection by P. vivax and P. falciparum

From: High prevalence of very-low Plasmodium falciparum and Plasmodium vivax parasitaemia carriers in the Peruvian Amazon: insights into local and occupational mobility-related transmission

Characteristics

P. vivax PRBC-PCR

P. falciparum PRBC-PCR

Total

n = 450 (%)

Positive

n = 113 (%)

Negative

n = 337 (%)

p value

Positive

n = 22 (%)

Negative

n = 428 (%)

p value

Study area

  

0.146*

  

0.371

 

 Cahuide

77 (68.1)

203 (60.2)

 

16 (72.7)

264 (61.7)

 

280 (62.2)

 Lupuna

36 (31.9)

134 (39.8)

 

6 (27.3)

164 (38.3)

 

170 (37.8)

Sex

  

0.191*

  

0.195*

 

 Male

58 (51.3)

148 (43.9)

 

7 (31.8)

199 (46.5)

 

206 (45.8)

 Female

55 (48.7)

189 (56.1)

 

15 (68.2)

229 (53.5)

 

244 (54.2)

Age groups (years)

  

0.001**

  

0.022**

 

 < 10

24 (21.2)

119 (35.3)

 

2 (9.1)

141 (32.9)

 

143 (31.8)

 10–29.9

41 (36.3)

133 (39.5)

 

9 (40.9)

165 (38.6)

 

174 (38.7)

 ≥ 30

48 (42.5)

85 (25.2)

 

11 (50.0)

122 (28.5)

 

133 (29.6)

Education

  

0.243

  

0.503

 

 None

10 (8.8)

51 (15.1)

 

1 (4.6)

60 (14.0)

 

61 (13.6)

 Primary school

67 (59.3)

183 (54.3)

 

14 (63.6)

236 (55.1)

 

250 (55.6)

 Secondary school or higher

36 (31.9)

103 (30.6)

 

7 (31.8)

132 (30.8)

 

139 (30.9)

Occupation (> 18 years old)

  

0.424

  

0.756

 

 Logger or charcoal worker

6 (9.0)

8 (5.8)

 

2 (13.3)

12 (6.3)

 

14 (6.9)

 Farmer

19 (28.4)

30 (21.9)

 

3 (20.0)

46 (24.3)

 

49 (24.0)

 Trader

4 (6.0)

8 (5.8)

 

0 (0.0)

12 (6.3)

 

12 (5.9)

 Others

10 (14.9)

15 (11.0)

 

2 (13.3)

23 (12.2)

 

25 (12.2)

 None

28 (41.8)

76 (55.5)

 

8 (53.3)

96 (50.8)

 

104 (51.0)

Time in community (years)

  

0.071*

  

0.209

 

 ≤ 2

24 (21.8)

45 (14.2)

 

5 (26.3)

64 (15.7)

 

69 (16.2)

 > 2

86 (78.2)

272 (85.8)

 

14 (73.7)

344 (84.3)

 

358 (83.8)

Mammal-livestock

  

0.443

  

1.000

 

 Yes

60 (53.1)

194 (57.6)

 

12 (54.5)

242 (56.5)

 

254 (56.4)

 No

53 (46.9)

143 (42.4)

 

10 (45.5)

186 (43.5)

 

196 (43.6)

Avian-livestock

  

0.724

  

1.000

 

 Yes

77 (68.1)

236 (70.0)

 

15 (68.2)

298 (69.6)

 

313 (69.6)

 No

36 (31.9)

101 (30.0)

 

7 (31.8)

130 (30.4)

 

137 (30.4)

Impregnated bed nets

  

0.048**

  

1.000

 

 Yes

75 (66.4)

257 (76.3)

 

16 (72.7)

316 (73.8)

 

332 (73.8)

 No

38 (33.6)

80 (23.7)

 

6 (27.3)

112 (26.2)

 

118 (26.2)

  1. PRBC packed red blood cells
  2. Fisher’s exact test p value: * p < 0.2, ** p < 0.05