Table 6 Prevalence (with 95% confidence limits) by age group of malaria parasitaemia and three measures of mild malaria morbidity in highland and lowland hamlets from monthly surveys in hamlets with or without treated nets in the post-intervention year.

% with malaria parasites

31.4(26.1,36.7)

44.3 (40.6, 48.0)

49.4 (46.3, 52.6)

No

54.1(48.9,59.5)

[2.60***(1.86, 3.64)]

73.0(69.9,76.1)

[3.55***(1.95, 6.49)]

67.7 (65.0, 70.5)

[2.14***(1.39, 3.28)]

Low

Yes

63.1(56.2,69.9)

78.3 (74.9, 81.7)

80.6 (77.9 (83.3)

No

82.9 (77.8, 87.9)

[2.80***(1.70, 4.59)]

88.8(86.2,91.4)

[2.21**(1.11, 3.68)]

83.3 (80.9, 85.8)

[1.25 n.s.(0.70, 2.23)]

% with malaria fever^f

High

Yes

2.3(0.6,4.1)

1.8(0.8,2.8)

0.4 (0.0, 0.8)

No

7.4(4.6,10.2)

[3.10**(1.27, 7.60)]

4.5(3.1,5.9)

[2.70**(1.31, 5.57)]

1.2(0.6,1.9)

[2.71* (1.06, 6.93)]

Low

Yes

5.1 (2.0,8.3)

3.2(1.7,4.6)

1.3(0.6,2.1)

No

14.8 (10.0, 19.6)

[3.14***(1.96, 5.02)]

8.0 (5.7, 10.2)

[2.56**(1.32, 4.97)]

1.0(0.4,1.7)

[0.76 n.s.(0.26, 2.22)]

% anaemic^w

(<8 g Hb/dl)

High

Yes

3.9(1.6,6.2)

2.0 (0.9,3.0)

0.7(0.1,1.2)

No

19.9(15.5,24.3)

[5.86***(2.89, 11.87)]

4.3 (2.9, 5.8)

[2.43**(1.31, 4.51)]

2.2(1.3,3.0)

[2.94**(1.27, 6.82)]

Low

Yes

15.4(10.3,20.6)

3.4(1.9,4.8)

2.1(1.1,3.1)

No

37.5(31.0,44.0)

[3.59***(2.01, 6.40)]

8.2 (5.9, 10.4)

[2.75**(1.39, 5.43)]

4.2 (2.9, 5.5)

[1.85 n.s.(0.83, 4.12)]

% with splenomegaly

High

Yes

12.4(8.6,16.1)

26.1(22.9,29.3)

33.3 (30.3, 36.3)

No

39.2 (34.0, 44.5)

[4.93***(2.51, 9.70)]

52.5 (49.0, 56.0)

[3.23**(1.53, 6.84)]

52.9 (50.0, 55.9)

[2.32**(1.21, 4.46)]

Low

Yes

51.1(43.9,58.2)

70.8 (67.0, 74.6)

56.0 (52.5, 59.5)

No

69.6 (63.4, 75.8)

[2.18*(1.09,4.34)]

75.4(71.8,79.0)

[1.26 n.s.(0.80, 1.99)]

60.8(57.6,64.1)

[1.25 n.s.(0.88, 1.76)]