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Table 1 Detection of pulmonary TB among participants screened in population-based surveillance sites in Lwak and Kibera in Kenya, 2011–2014

From: Tuberculosis case finding using population-based disease surveillance platforms in urban and rural Kenya

  AT HOME AT CLINIC
Resident population
N
Pop. Screened
n (% of resident pop)
Possible TB casesa
n (% of pop. screened)
Sputum obtained
n (% of possible TB cases)
Confirmed
TB cases
n (% of those with sputum obtained)
TB detection
rate per 100,000 persons screened (95% CI)
Prevalence ratio (95% CI) Resident population
N
Pop. Screened
n (% of resident pop)
Possible TB casesa
n (% of population screened)
Sputum obtained
n (% of possible TB cases)
Confirmed
TB cases
n (% of those with sputum obtained)
TB detection rate per 100,000 persons screened (95% CI) Prevalence ratio (95% CI)
a) Lwak
Overall 13,740 6575 (47.9) 1804 (27.4) 1546 (85.7) 18 (1.2) 274 (162–432)   13,800 5765 (41.8) 4242 (73.6) 607 (14.3) 28 (4.6) 486 (323–701)  
Age (yrs)
 15–34 7816 2613 (33.4) 521 (19.9) 422 (81.0) 4 (0.9) 153 (42–392) Ref 7565 3315 (43.8) 2399 (72.4) 227 (9.5) 15 (6.6) 452 (254–745) Ref
  ≥ 35 5924 3962 (66.9) 1283 (32.4) 1124 (87.6) 14 (1.2) 353 (193–592) 2.31 (0.76–7.00) 6235 2450 (39.3) 1843 (75.2) 380 (20.6) 13 (3.4) 531 (283–906) 1.17 (0.56–2.46)
Gender
 Female 7617 4716 (61.9) 1289 (27.3) 1107 (85.9) 11 (1.0) 233 (117–417) Ref 7588 3811 (50.2) 2853 (74.9) 401 (14.1) 12 (3.0) 315 (163–549) Ref
 Male 6123 1859 (30.4) 515 (27.7) 439 (85.2) 7 (1.6) 377 (152–774) 1.61 (0.63–4.16) 6212 1954 (31.4) 1389 (71.1) 206 (14.8) 16 (7.8) 819 (469–1326) 2.60 (1.23–5.49)
HIV
 HIV-Neg 6519 3332 (51.1) 974 (29.2) 850 (87.3) 4 (0.5) 120 (33–307) Ref 8857 3634 (41.0) 3099 (85.3) 153 (4.9) 3 (2.0) 83 (17–241) Ref
 HIV-pos 1143 761 (66.6) 235 (30.9) 211 (89.8) 6 (2.8) 788 (290–1708) 6.57 (1.86–23.22) 1716 891 (51.9) 808 (90.7) 437 (54.1) 24 (5.5) 2694 (1733–3982) 32.63 (9.85–108.11)
Unknown 6078 2482 (40.8) 595 (24.0) 485 (81.5) 8 (1.6) 322 (139–634) 2.68 (0.81–8.91) 3227 1240 (38.2) 335 (27.0) 17 (5.1) 1 (5.9) 81 (2–449) 0.98 (0.10–9.38)
  AT HOME AT CLINIC
  Resident population
N
Pop. Screened
n (% of resident pop.)
Possible TB casesb
n (% of pop. screened)
Sputum obtained
n (% of possible TB cases)
Confirmed
TB cases
n (% of those with sputum obtained)
TB detection
rate per 100,000 persons screened (95% CI)
Prevalence ratio (95% CI) Resident population
N
Pop. Screened
n (% of resident pop.)
Possible TB casesb
n (% of population screened)
Sputum obtained
n (% of possible TB cases)
Confirmed
TB cases
n (% of those with sputum obtained)
TB detection
rate per 100,000 persons screened
(95% CI)
Prevalence ratio (95% CI)
b) Kibera
Overall 12,864 4616 (35.9) 891 (19.3) 712 (79.9) 14 (2.0) 303 (164–508)   11,448 5997 (52.4) 3258 (54.3) 675 (20.7) 41 (6.1) 684 (491–926)  
Age (yrs)
 15–34 9115 3218 (35.3) 529 (16.4) 410 (77.5) 9 (2.2) 280 (128–530) Ref 7503 4229 (56.4) 2303 (54.5) 414 (18.0) 24 (5.8) 568 (364–843) Ref
  ≥ 35 3749 1398 (37.3) 362 (25.9) 302 (83.4) 5 (1.7) 358 (116–833) 1.28 (0.43–3.81) 3945 1768 (44.8) 955 (54.0) 261 (27.3) 17 (6.5) 962 (561–1535) 1.69 (0.91–3.15)
Gender
 Female 6947 3220 (46.4) 614 (19.1) 491 (80.0) 9 (1.8) 280 (128–530) Ref 5693 3743 (65.7) 2106 (56.3) 387 (18.4) 18 (4.7) 481 (285–759) Ref
 Male 5917 1396 (23.6) 277 (19.8) 221 (79.8) 5 (2.3) 358 (116–834) 1.28 (0.43–3.82) 5755 2254 (38.4) 1152 (51.1) 288 (25.0) 23 (8.0) 1020 (648–1527) 2.12 1.15–3.92)
HIV
 HIV-Neg 3084 927 (30.1) 247 (26.6) 194 (78.5) 3 (1.5) 324 (67–943) Ref 4979 2830 (56.8) 1835 (64.8) 213 (11.6) 16 (7.5) 565 (324–917) Ref
 HIV-pos 371 149 (40.2) 37 (24.8) 25 (67.6) 6 (24.0) 4027 (1768–7793) 12.44 (3.15–49.22) 662 374 (56.5) 286 (76.5) 158 (55.2) 19 (12.0) 5080 (3086–7820) 8.99 (4.66–17.32)
Unknown 9409 3540 (37.6) 607 (17.1) 493 (81.2) 5 (1.0) 141 (46–329) 0.44 (0.10–1.82) 5799 2793 (48.2) 1137 (40.7) 304 (26.7) 6 (2.0) 215 (79–467) 0.38 (0.15–0.97)
  1. aPossible TB cases = Anyone meeting any of the following: any cough, fever, or night sweats in last 2 weeks, or weight loss in last one month. Data at home collected between October – December 2011. Clinic data collected between May 2012 – April 2014. For clinic, resident population is at 30th April 2014. CI=Confidence Interval
  2. bPossible TB cases = Anyone meeting any of the following: any cough, fever, night sweats in last 2 weeks or weight loss in last one month. Data at home collected between January – March 2012. Clinic data collected between April 2012 – March 2014. For clinic, resident population is at 31st March 2014. CI=Confidence Interval