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Table 1 Characteristics of study population

From: Comparison of two interferon gamma release assays in the diagnosis of Mycobacterium tuberculosis infection and disease in The Gambia

Characteristics Contacts
Sleeping proximity gradient
Cases ALL
  Separate house Separate room Same room   
  n = 38 n = 115 n = 41 n = 80 n = 274
Age, years      
   Mean 29.7 30.0 34.3 31.2 31.0
   Median (IQR) 26.5(19–36) 25.0(18–36) 32.0(25–44) 30(23–36) 28(20–37)
Sex      
   Male 18(47.4) 38(33.1) 20(48.8) 51(63.8) 127(46.4)
   Female 20(52.6) 77(66.9) 21(51.2) 29(36.2) 147(53.6)
Ethnic group      
Madinka 11(28.9) 47(40.9) 17(41.5) 26(32.5) 101(36.9)
Jola 7(18.4) 32(27.8) 7(17.0) 19(23.8) 65(23.7)
Wollof 2(5.3) 10(8.7) 5(12.2) 8(10.0) 25(9.1)
Fula 8(21.1) 7(6.1) 4(9.8) 11(13.7) 30(11.0)
Others 10(26.3) 19(16.5) 8(19.5) 16(20.0) 53(19.3)
Clinical Findings      
   BCG scar      
Absent 20(55.6) 48(43.6) 24(66.7) 34(42.5) 126(46.0)
Present 16(44.4) 59(53.7) 9(25.0) 19(23.8) 103(37.6)
Uncertain 0(0.0) 3(2.7) 3(8.3) 27(33.7) 45(16.4)
HIV results*      
Positive 0(0.0) 3(2.6) 0(0.0) 7(8.8) 10(3.7)
  1. Data are no. (%) of persons unless stated otherwise.
  2. BCG, Bacille Calmette-Guérin
  3. *Data are for 178 contacts and 77 cases.