Table 2. Factors adjusted between the DM groups and Non-DM groups.
| Studies and years | Adjusted factors |
|---|---|
| Bergamino et al., 201933) | Age, gender, smoking, ECOG, stage, comorbidities, radiotherapy dose |
| Motoishi et al., 201717) | Age, gender, BMI, smoking, histology type, surgical procedure, pathological stage, adjuvant therapy, EGFR |
| Humar et al., 201721) | Gender, smoking, histology type, ECOG-PS, IGF1R |
| Hershman et al., 201628) | Age, gender, race, weight loss, LDH, stage IIIB or IV |
| Medaiors et al., 201629) | Age, gender, smoking, race, BMI, comorbidities, ECOG-PS, pathologic stage, procedure, adjuvant chemotherapy |
| Imai et al., 201518) | Age, gender, BMI, ECOG-PS, stage, histology, smoking |
| Ahmed et al., 201523) | Gender, smoking, ethnicity, comorbidities, histology type, stage, ECOG-PS |
| Jeon et al., 201519) | Tuberculosis, stage, size, visceral pleural invasion, positive margin, pathological stage, LVI, BVI, incomplete resection |
| Inal et al., 201430) | Age, gender, ECOG-PS, smoking, weight loss, stage, chemotherapy, metastasis |
| Inachina et al., 2014 | Age, gender, stage, resection |
| Dhillon et al., 201424) | Age, gender, smoking, histology |
| Luo et al., 201220) | Age, gender, smoking, ECOG-PS, BMI, stage, cancer treatment |
| Washington et al., 201225) | Age, gender, surgical procedure, tumor size, stage, histology, adjuvant chemotherapy, visceral pleural invasion |
| Bartling et al., 201127) | Age |
| Hatlen et al., 201126) | Age, gender, histology, stage, smoking, performance status |
| Win et al., 200831) | Shuttle walk distance |
| Van de Poll-Franse et al., 200732) | Age, gender, stage, treatment |
DM: diabetes mellitus; BMI: body mass index; ECOG-PS: Eastern Cooperative Oncology Group performance status; EGFR: epidermal growth factor receptor; IGF1R: insulin-like growth factor-1 receptor; LDH: lactate dehydrogenase; LVI: lymphatic vessel invasion; BVI: blood vessel invasion.