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Table 3 Study population, smear-positive TB cases identified over 12 months and incidence rate per 100,000 persons per year, Hetosa District, Arsi Zone of Oromia Region, Central Ethiopia

From: Prevalence and Incidence of Smear-Positive Pulmonary Tuberculosis in the Hetosa District of Arsi Zone, Oromia Regional State of Central Ethiopia

Category Person-year Smear-positive Pulmonary Tuberculosis (PTB+) (n = 70) Bacteriologically Confirmed Pulmonary Tuberculosis (BCTB) (n = 76)
Number of diagnosed PTB+ cases Incidence rate per 100,000 person-year (95% CI) Adjusted Incidence Rate Ratio (aIRR) (95% CI) Number of BCTB Incidence rate per 100,000 person-year (95% CI) Adjusted Incidence Rate Ratio (aIRR) (95% CI)
sex
Male 16,741 36 215 (144.8–285.3) 1.00 38 227 (156.7–299.2) 1.00
Female 16,038.5 34 212 (140.7–283.2) 1.22 (0.78–1.93) 38 237 (161.6–312.3) 1.26 (0.80–1.97)
Age
15–24 11,631.5 16 138 (70.2–205) 1.00 19 163(64.1–236.8) 1.00
25–34 7,865 8 102 (31.2–172.2) 1.30 (0.64–2.67) 9 114 (39.7–189.2) 1.51(0.73–3.15)
35–44 5,514 20 363 (203.7–521.7) 2.40 (1.18–4.55) 21 381(218.0–543.7) 2.76 (1.38–5.52)
≥45 7,769 26 335 (206.0–463.3) 1.66 (1.44–4.91) 27 348 (216.4–478.6) 3.05 (1.63–5.71)
Residence
Urban 5,843.5 13 222 (101.5–343.4) 1.00 16 274(139.6–408.0) 1.00
Rural 26,936 57 212 (156.7–266.5) 1.23 (0.71–2.14) 60 223(166.4–279.10 1.25 (0.72–2.16)
History of TB contact
NO 31,138 50 161 (116.1–205.1) 1.00 56 180(132.7–217.6) 1.00
Yes 1,641.5 20 1218 (686.4–1752.4) 4.11 (2.18–7.77) 20 1218(686.4–1752.4) 5.11 (2.63–9.96)
Total 32,779.5 70 214 (163.5–263.5)   76 232(179.7–283.9)