Table 2. Characteristics of the included case-control studies.
| Journal | Author and publication date | Country | Enrollment period | Study type | Lung cancer | Female HRT users | Female never smokers | Nos assessment | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| S or Non | Non | Ever HRT use vs. never use | Ever HRT use vs. never use | ||||||||
| Cancer Causes Control | Yen-Li Lo 2013 | China | 2002–2009 | Case-control | All | – | 0.75 (0.63–0.91) | 0.75 (0.63–0.91) | 8 | ||
| International Journal of Cancer | Angela Cecilia Pesatori 2013 | Italy | 2002–2005 | Case-control | All | – | 0.59 (0.42–0.84) | – | 6 | ||
| International Journal of Cancer | Cari L. Meinhold 2011 | USA | 1998–2008 | Case-control | – | Non | 0.79 (0.62–1.02) | 1.18 (0.60–2.32) | 6 | ||
| Cancer | Kuan-Yu Chen 2007 | China | 2002–2006 | Case-control | All | – | 0.63 (0.48–0.82) | 0.63 (0.48–0.83) | 7 | ||
| Oncology | N. Ramnath 2007 | USA | 1982–1998 | Case-control | – | Non | 0.72 (0.57–0.91) | - | 7 | ||
| Journal of Clinical Oncology | Ann G. Schwartz 2007 | USA | 2001–2005 | Case-control | – | Non | 0.89 (0.69–1.14) | – | 6 | ||
| Clinical Cancer Research | Matthew B. Schabath 2004 | USA | NG | Case-control | All | – | 0.78 (0.61–1.00) | 1.23 (0.71–2.13) | 8 | ||
| Contraception | Alison M. Elliott 2006 | UK | 1968–2004 | Nested case-control | All | – | 0.92 (0.47–1.79) | – | 6 | ||
| International Journal of Epidemiol | Michaela Kreuzer 2003 | Germany | 1990–1996 | Case-control | All | – | 0.75 (0.60–0.93) | 0.78 (0.42–1.45) | 7 | ||
NG/–, not given; All, small cell lung cancer or non-small lung cancer; Non, non-small lung cancer; S, small lung cancer; HRT, hormone replacement therapy; NOS, Newcastle-Ottawa Assessment Scale.