Study name | Year | Type of Study | Country | Outcome Measure | Adjusted Outcome (Y/N) | Length of follow-up | NOS Score |
---|---|---|---|---|---|---|---|
Jenwitheesuk et al. [12] | 2010 | Retrospective Cohort | Thailand | Crude OS; HR’s | N | 5 years | 7 |
Lin et al. [6] | 2006 | Retrospective Cohort | China | Crude OS; adjusted HR’s | Y | Median 37.1 mo (5.5–189.5) | 8 |
Dixit et al.[13] | 1998 | Retrospective Cohort | India | Crude LRR; adjusted HR’s | Y | Median 32 mo (7–72) | 5 |
Chaudhary et al. [14] | 1989 | Retrospective Cohort | India | Crude LRR | N | 2 years | 7 |
Pop et al. | 1989 | Retrospective Cohort | Netherlands | Crude LRR | N | 5 years | 7 |