Table 2.
Basic Information About the Studies Included in the Subgroup Analysis of Duration of Exposure and COPD Prevalence
| Ref | Authors | Group | OR (95% CI) | _ES | Logor | N | W(%) |
|---|---|---|---|---|---|---|---|
| [20] | Eisner et al | >5 years | 1.56 (1.18–2.06) | 1.56 | 0.44 | 2113 | 12.3 |
| [21] | Yin et al | <=5 years | 1.35 (1.02–1.79) | 1.35 | 0.30 | 5609 | 12.3 |
| >5 years | 1.52 (1.17–1.97) | 1.52 | 0.42 | 5675 | 12.3 | ||
| [22] | Wu et al | >5 years | 2.10 (1.35–3.26) | 2.10 | 0.74 | 391 | 12.0 |
| [24] | Zubair et al | <=5 years | 12.13 (0.68–217.82) | 12.13 | 2.50 | 236 | 4.3 |
| >5 years | 77.11 (4.56–1303.91) | 77.11 | 4.35 | 182 | 4.5 | ||
| [26] | Sinha et al | <=5 years | 4.04 (1.17–13.95) | 4.04 | 1.40 | 746 | 9.3 |
| >5 years | 41.14 (15.03–112.60) | 41.14 | 3.72 | 974 | 11.0 | ||
| [27] | Hagstad et al | <=5 years | 1.87 (1.20–2.91) | 1.87 | 0.62 | 2118 | 12.0 |
| [29] | Sezer et al | >5 years | 2.25 (1.04–4.87) | 2.25 | 0.81 | 148 | 10.2 |
| Group | OR (95% CI) | I2 | p | ||||
| Synthesis | <=5 years | 1.78 (1.17–272) | 49% | 0.12 | |||
| >5 years | 4.38 (1.28–15.0) | 89% | <0.01 |