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Table 3 Comparison of contacts with and without GeneXpert-diagnosed TB

From: Tuberculosis infection among youths in overcrowded university hostels in Kenya: a cross-sectional study

Demographic characteristics GeneXpert-diagnosed TB (N = 5) Clinical signs and GeneXpert-diagnosed TB (N = 13)
TB No TB P-value# TB No TB P-value#
Contact type N (%)
 Household 4 (5.3) 72 (95) 0.17 6 (7.9) 70 (92) 0.85
 Social 1 (1.3) 79 (99) 7 (8.8) 73 (91)
Age group N (%)
 < 20 years 0 24 (100) 0.64 1 (4.2) 23 (96) 0.73
 20–25 years 5 (4.6) 109 (95) 11 (10) 98 (90)
 > 25 years 0 23 (100) 1 (4.4) 22 (96)
Gender N (%)
 Male 2 (2.5) 78 (98) 0.48 7 (8.8) 73 (91) 0.85
 Female 3 (4.0) 73 (96) 6 (7.9) 70 (92)
Relation to index case N (%)
 Relative 1 (2.4) 41 (98) 0.58 2 (4.8) 40 (95) 0.46
 Friend 2 (2.5) 78 (98) 7 (8.8) 73 (91)
 Student 0 7 (100) 0 7 (100)
 Others* 2 (7.4) 25 (93) 4 (15) 23 (85)
Time spent with index case N (%)
 All time 3 (6.5) 43 (94) 0.60 5 (11) 41 (89) 0.73
 Night only 1 (2.4) 41 (98) 2 (4.8) 40 (95)
 Day only 1 (1.6) 61 (98) 6 (9.7) 56 (90)
 Others % 0 6 (100) 0 6 (100)
Share a bed with index case N (%) 4 (15) 22 (85) 0.003 4 (15) 22 (85) 0.15
Sleep in same room with index N (%) 4 (7.1) 52 (93) 0.06 5 (8.9) 51 (91) 0.84
Clinical signs N (%)
 Coughing ≥ 2 weeks 5 (6.1) 77 (94) 0.06 13 (16) 69 (84) < 0.001
 Fever 4 (6.7) 56 (93) 0.07 12 (20) 48 (80) < 0.001
 Had weight loss 2 (2.9) 67 (97) 0.98 10 (14) 59 (86) 0.02
 Drenching night sweats 5 (10) 43 (90) 0.002 13 (27) 35 (73) < 0.001
 Swelling at neck/armpits/groin 1 (3.7) 26 (96) 0.98 6 (22) 21 (78) 0.01
Underlying medical conditions 0 9 (100) 0.98 3 (33) 6 (67) 0.03
HIV positive 0 3 (100) 0.98 0 3 (100) 0.98
  1. #P-values from Chi-square/Fisher’s exact test,*18-roommate, 5-coursemate, 4-boy/girlfriend, % 1-anytime, 3-once in a while, 1-weekends only, 1-once in a while