Table 4.

Relative risk estimates from mixed-effects poisson regression model of HWs with TB and those without TB (N = 32,039)

	Unadjusted	P-Value	Adjusted	P-Value
	RR (95% CI)		RR (95% CI)
Birth Year
1980–1989	1·00		1·00
1970–1979	4·28 (3·24 to 5·65)	<0·0001	3·84 (2·89 to 5·09)	<0·0001
1960–1969	7·95 (6·06 to 10·42)	<0·0001	7·29 (5·48 to 9·72)	<0·0001
1950–1959	6·10 (4·59 to 8·10)	<0·0001	7·11 (5·22 to 9·69)	<0·0001
1940–1949	3·43 (2·43 to 4·85)	<0·0001	4·03 (2·78 to 5·83)	<0·0001
1930–1939	1·79 (0·16 to 20·84)	0·99	1·39 (0·13 to 15·13)	0·99
Race
White	1·00		1·00
African	6·74 (4·98 to 9·11)	<0·0001	5·30 (3·90 to 7·20)	<0·0001
Coloured	3·59 (2·32 to 5·56)	<0·0001	2·90 (1·87 to 4·50)	<0·0001
Asian	1·15 (0·18 to 7·02)	0·99	1·05 (0·18 to 6·07)	0·99
Sex
Female	1·00		1·00
Male	1·41 (1·31 to 1·53)	<0·0001	1·51 (1·38 to 1·64)	<0·0001
Facility Type
Non-Clinical	1·00		−	−
Hospital	2·04 (0·79 to 5·26)	0·19	−	−
Clinic	2·47 (0·67 to 9·12)	0·24	−	−
Occupation
Allied Health Professional	1·00		1·00
Doctor/Surgeon	1·13 (0·83 to 1·53)	0·84	0·85 (0·62 to 1·15)	0·60
Nurse	2·07 (1·58 to 2·71)	<0·0001	1·24 (0·93 to 1·63)	0·25
Administrative/Clerical	1·74 (1·29 to 2·32)	<0·0001	1·13 (0·84 to 1·51)	0·82
Support Staff	2·36 (1·79 to 3·11)	<0·0001	1·28 (0·96 to 1·70)	0·14
Duration of Employment (yrs)
20+	1·00		1·00
16–20	2·05 (1·71 to 2·47)	<0·0001	1·97 (1·63 to 2·39)	<0·0001
11–15	3·36 (2·80 to 4·04)	<0·0001	3·60 (2·97 to 4·37)	<0·0001
6–10	1·21 (0·99 to 1·48)	0·09	1·72 (1·38 to 2·14)	<0·0001
1–5	1·06 (0·89 to 1·28)	0·97	1·92 (1·56 to 2·37)	<0·0001
< 1	2·74 (2·24 to 3·53)	0·03	1·60 (1·44 to 1·82)	<0·0001