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Table 3 Mortality rates across explanatory variables

From: High mortality among tuberculosis patients on treatment in Nigeria: a retrospective cohort study

Variable Number Number of deaths (%) Person-months (pm) Mortality rate per 100 pm (95% CI)
Age group (years)
 15–24 260 25 (9 · 6) 1344 · 0 1 · 86 (1 · 26-2 · 75)
 25–34 395 60 (15 · 2) 1874 · 8 3 · 20 (2 · 49-4 · 12)
 35–44 334 50 (15 · 0) 1512 · 2 3 · 31 (2 · 51-4 · 36)
 45–54 185 57 (30 · 8) 650 · 8 8 · 76 (6 · 76-11 · 36)
 55–64 85 14 (16 · 5) 344 · 5 4 · 06 (2 · 41-6 · 86)
  > 65 72 22 (30 · 6) 251 · 7 8 · 74 (5 · 76-13 · 27)
Gender
 Male 810 147 (18 · 2) 3544 · 7 4 · 15 (3 · 53-4 · 87)
 Female 614 90 (14 · 7) 2891 · 5 3 · 11 (2 · 53-3 · 83)
Residence
 Within Kano 1,014 76 (7 · 5) 5208 · 8 1 · 46 (1 · 17-1 · 83)
 Outside Kano 410 161 (39 · 3) 1227 · 4 13 · 12 (11 · 24-15 · 31)
Referral facility
 DOTS-linked facility 624 34 (5 · 5) 2470 · 7 1 · 05 (0 · 75-1 · 47)
 Non DOTS-linked facility 740 201 (27 · 2) 2907 · 0 6 · 91 (6 · 02-7 · 94)
TB diagnosis
 Bacteriological 468 13 (2 · 8) 2819 · 1 0 · 46 (0 · 27-0 · 79)
 Clinical 956 224 (23 · 4) 3617 · 1 6 · 19 (5 · 43-7 · 05)
TB site
 Pulmonary 936 105 (11 · 2) 4527 · 9 2 · 32 (1 · 92-2 · 81)
 Extra-pulmonary 229 36 (15 · 7) 1146 · 3 3 · 14 (2 · 27-4 · 35)
 Both 223 95 (42 · 6) 719 · 3 13 · 21 (10 · 80-16 · 15)
HIV/ART status
 HIV- 683 111 (16 · 3) 3271 · 4 3 · 39 (2 · 82-4 · 09)
 HIV+ not on ART 478 104 (21 · 8) 1895 · 4 5 · 49 (4 · 53-6 · 65)
 HIV+ on ART 90 7 (7 · 8) 460 · 4 1 · 52 (0 · 72-3 · 19)
 Unknown HIV status 173 15 (8 · 8) 809 · 0 1 · 85 (1 · 12-3 · 08)
Previous TB treatment
 No 1.082 93 (8 · 6) 5340 · 9 1 · 74 (1 · 42-2 · 13)
 Yes 342 144 (42 · 1) 1095 · 3 13 · 15 (11 · 17-15 · 48)
Year of diagnosis
 2010–2011 413 76 (18 · 4) 1721 · 5 4 · 41 (3 · 52-5 · 53)
 2012 321 81 (25 · 2) 1319 · 1 6 · 14 (4 · 94-7 · 63)
 2013 450 53 (11 · 8) 2195 · 3 2 · 41 (1 · 84-3 · 16)
 2014 240 27 (11 · 3) 1200 · 2 2 · 25 (1 · 54-3 · 28)