Table 1 Independent studies of prevalence of silicosis (ILO profusion ≥ 1/1) and tuberculosis using radiography from a random samplea of ex-miners who worked in South Africa
Study | Population & inclusion criteria | Mean age in years | Mean duration of employment | Size of studyb | Silicosis % ± 95 CI | TB % ± 95 CI | Both % ± 95 CI |
|---|---|---|---|---|---|---|---|
(range) | (count) | (count) | (count) | ||||
Girdler-Brown et al., 2008 [28] | Former gold miners from Lesotho | 49.4 (25–61) | 25.6 | 610 | 24.3% ± 3.4% (148) | 30.2% ± 3.6% (184) | 10.7% ± 2.5% (65) |
Trapido et al., 1998 [30] | Random sample of ex-miners in the Libode district | 52.8 (34–78) | 9.3 | 228 | 20.6% ± 5.3% (47) | 32.9% ± 6.1% (75) | – |
Steen et al., 1997 [31] | Former miners from Botswana | 55.7 (28–93) | 13.4 | 101 | 25.7% ± 8.6% (26c) | 26.7% ± 8.7% (27) | – |
Hnizdo and Sluis-Cremer, 1993 [32] | Former white gold miners, age 45–54 years, underground service of at least 10 years | 52.6 (30–70) | 23.5 | 2235 | 14.0% ± 1.4% (313) | – | – |
Meel, 2002 [29] | Former gold miners from Transkei district | 51.6 (35–66+) | 12.4 | 271 | 33.9% ± 5.7% (92) | 61.6% ± 5.8% (167) | 28.4% ± 5.4% (77) |
Churchyard et al., 2004 [33] | Active black gold miners over 40 years of age in the North West province | 46.7 (37–59) | 21.8 | 515 | 18.3% ± 3.3% (94) | 19.6% ± 3.4% (101) | – |
Average | 51.5 | 17.7 | 660 | 17.1%d ± 1.2% | 30.5%d ± 2.1% | 13.7%d ± 2.2% |