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Table 4 Included Study Characteristics

From: Evaluating the effectiveness of adjuvant radiotherapy in addition to surgery versus surgery alone at improving oncologic outcomes for early stage buccal carcinoma: a systematic review

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

  1. OS Overall survival
  2. HR Hazard ratio
  3. NOS Newcastle-Ottawa Scale