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Table 1 Characteristics of children who were infected with any STH at recruitment and presented at the 15-month follow-up point (n =1 141), by treatment group

From: Impact of single annual treatment and four-monthly treatment for hookworm and Ascaris lumbricoides, and factors associated with residual infection among Kenyan school children

 

Treatment group

Characteristicsa

Annual treatment

(N = 562)

Four-monthly treatment

(N = 579)

Characteristics

 Sex, male

54.8 (308/562)

53.4 (309/579)

 Age, years

10.3 (2.5)

10.4 (2.5)

 Thin

12.5 (70/562)

11.1 (64/579)

 Stunted

27.2 (153/562)

27.3 (158/579)

 Underweightb

6.12 (18/294)

6.25 (19/298)

 Hemoglobin, g/dL

12.3 (1.3)

12.3 (1.4)

 Anemia

36.0 (194/539)

40.7 (227/558)

STH infection

 Hookworm

58.7 (330/562)

59.9 (347/579)

  Ascaris lumbricoides

55.7 (313/562)

56.7 (328/579)

  Trichuris trichiura

1.6 (9/562)

1.2 (7/579)

 Any STH infection

100 (562/562)

100 (579/579)

STH infection intensity (epg)

 Hookworm

106 (66–185)

180 (98–330)

  A. lumbricoides

3 234 (2 539–4 119)

2 605 (1 968–3 449)

Household characteristics

 Socioeconomic status

  Poor

64.3 (342/532)

64.1 (356/555)

  Less poor

35.7 (190/532)

35.9 (199/555)

 Water source

  Non-improved drinking water

6.7 (36/538)

3.5 (20/558)

  Improved drinking water

93.3 (502/538)

96.4 (538/558)

 Floor

  Mud

95.2 (513/539)

94.1 (526/559)

  Cemented

4.8 (26/539)

5.9 (33/559)

 Pit latrine

  No

11.3 (61/539)

11.6 (65/560)

  Yes

88.7 (478/539)

88.4 (495/560)

School-level characteristics

 Baseline school prevalence

  Hookworm

    < 33%

31.3 (176/562)

36.8 (213/579)

   34–45%

35.6 (200/562)

32.5 (188/579)

    > 45%

33.1 (186/562)

30.7 (178/579)

   A. lumbricoides

   <27%

35.4 (199/562)

38.8 (225/579)

   28–30%

26.2 (147/562)

26.9 (156/579)

    > 40%

38.4 (216/562)

34.2 (198/579)

 School mean infection intensity

  Hookworm

   6–35

31.3 (176/562)

36.8 (213/579)

   44–90

35.6 (200/562

32.5 (188/579)

   102–453

33.1 (186/562)

30.7 (178/579)

   A. lumbricoides

   366–913

34.3 (193/562)

41.5 (240/579)

   914–2497

29.7 (167/562)

29.0 (168/579)

    > 2497

35.9 (202/562)

29.5 (171/579)

  Latrine cleanliness

   Clean

47.8 (269/562)

53.4 (309/579)

   Dirty

26.3 (148/562)

26.8 (155/579)

   Very dirty

25.8 (145/562)

19.9 (115/579)

  Children per latrine

    < 50:1

42.9 (241/562)

42.0 (243/579)

    > 50:1

57.1 (321/562)

58.0 (336/579)

  1. aData are proportions (N/n), unless otherwise stated
  2. bProvided for children aged 5–10