Table 3

Characteristics of child participants (n = 271)
Participant characteristics All participants (n = 271) AscarisIgE negative (n = 206) AscarisIgE positive (n = 65) TST negative (<10 mm, n = 64) TST positive (≥10 mm, n = 107)
Age (median, inter-quartile range(IQR)) 4.4 (1.9 – 8.3)* §§ 3.5 (1.6 – 6.7) 6.6 (4.5 - 10.3) 3.5 (1.6 – 5.7) 6.1 (3.2 – 10.2)
M.tb contact score (median (IQR)) 4 (0 – 5)* §§ 4 (1 – 6) 3 (0 – 5) 4 (0 – 5) 5 (1 – 7)
Male gender (%) 111 (41.0) 82 (39.8) 29 (44.6) 68 (41.5) 43 (40.2)
Ethnicity (%)
African 55 (20.3) 47 (22.8) 8 (12.3) 32 (19.5) 23(21.5)
Mixed ancestry 216 (79.7) 158 (76.7) 57 (87.7) 132 (80.5) 84 (78.5)
BCG history or scar present (%) 221 (81.6) §§ 172 (83.5) 49 (75.4) 143 (87.2) 78 (74.3)
Previous TB treatment (%) 8 (3.0) §§ 5 (2.4) 3 (4.6) 2 (1.2) 6 (5.6)
Current IPT (%) 4 (1.5) 3 (1.9) 0 2 (1.2) 2 (1.9)
TST positive (%) 107(39.5) 83 (40.3) 24(36.9) NA NA
History of passing a worm in <3 months (%) 21 (7.8) 13 (6.3) 7 (87.5) 15 (9.2) 6 (5.6)
History of deworming in < 3 months3 (%) 18 (6.6) 11 (5.3) 8 (12.3) 13 (7.9) 5 (4.7)
Anthropometric data (mean (SD))
Weight for age −0.55 (1.20) −0.49 (1.2) −0.76 (1.3) −0.48 (1.3) −0.67 (1.1)
Height for age −1.29 (1.6) −1.27 (1.6) −1.34 (1.5) −1.20 (1.9) −1.42 (0.9)
Weight for height 0.35 (1.2) 0.40 (1.2) 0.13 (1.1) 0.41 (1.2) 0.22 (1.1)
Socio-economic indicators and household demographics
Presence of a radio in household (%) 217 (80.1) §§ 163 (79.) 54 (83.1) 139 (84.8) 78 (72.9)
Presence of a refrigerator in household (%) 221 (81.6) §§ 166 (80.6) 55 (84.6) 144 (87.8) 77 (72.0)
Relying on the sale of household assets (%) 13 (4.8) 12 (5.8) 1 (1.5) 8 (4.9) 5 (4.7)
Flush toilet in the house (%) 184 (67.9) 141 (68.5) 43 (66.2) 114 (69.5) 70 (65.4)
Piped running water in residence (%) 225 (83.0) 169 (82.0) 56 (86.2) 137 (83.5) 88 (82.2)
Housing structure (%)
Tin shack 36 (13.4) 30 (14.6) 6 (9.5) 19 (1.7) 17 (16.1)
Brick 205 (76.5) 154 (75.1) 51 (81.0) 128 (78.5) 77 (73.3)
Other 27 (10.1) 21 (10.2) 6 (9.5) 16 (9.8) 11 (10.5)
Household composition (median (IQR))
Number of adults 5 (3 – 6) 5 (3 – 6) 4 (3 – 7) 5 (3 – 6) 4 (2 – 6)
Number of children 3 (2 – 5) 3 (2 – 5) 4 (2 – 5) 4 (2 – 5) 3 (2 – 4)
Median ratio of adult:children 1.25 (1 – 1.8) 1.25 (1 – 1.8) 1.25 (1–1.8) 1.25 (1 – 1.9) 1.25 (1 – 1.8)

TB = tuberculosis; BCG = bacillus Calmette-Guérin; IPT = Isoniazid preventive therapy, TST = tuberculin skin test.

*Ascaris groups significantly different, P-value ≤0.05.

§§ TST groups significantly different, P-value ≤0.05.

van Soelen et al.

van Soelen et al. BMC Infectious Diseases 2012 12:211   doi:10.1186/1471-2334-12-211

Open Data