The neglected burden of tuberculosis disease among health workers: a decade-long cohort study in South Africa

BMC Infectious Diseases

Table 2 Incidence rate ratios for TB among HWs by year (2002–2012)

Year	HCW Person Years (FTE) ^a	Observed Cases	Expected Cases	Incidence in General Population (per 100,000) ^b	Incidence in Healthcare Workers (per 100,000)	Incidence Rate Ratio (95% CI)	P-Value ^c
2002	13,473	80	34	248·5	593·8	2·35 (1·88–2·91)	<0·001
2003	13,964	198	77	552·2	1417·9	2·57 (2·23–2·95)	<0·001
2004	15,101	255	98	648·2	1688·6	2·60 (2·30–2·94)	<0·001
2005	16,448	365	117	708·1	2219·1	3·12 (2·81–3·45)	<0·001
2006	16,391	362	129	787·6	2208·5	2·81 (2·53–3·11)	<0·001
2007	16,641	371	136	815·1	2229·4	2·73 (2·46–3·02)	<0·001
2008	16,722	326	149	891·6	1949·5	2·19 (1·96–2·44)	<0·001
2009	16,404	157	138	842·1	957·1	1·39 (0·97–1·33)	0·106
2010	16,298	203	137	840·0	1245·6	1·48 (1·29–1·70)	<0·001
2011	17,973	191	148	822·7	1062·7	1·29 (1·12–1·49)	<0·001
2012	19,491	169	148	757.0	867·1	1·14 (0·98–1·32)	0·084
Overall TB incidence among HWs for study period					1496·32

^aFTE = Full Time Equivalent
^bAs reported by the South African National Department of Health (from ETR.Net) and Statistics South Africa
^cChi-Square Test

ISSN: 1471-2334