Fig. 3
From: The effect of ambient PM2.5 exposure on survival of lung cancer patients after lobectomy
HRs of postoperative death in lung cancer patients in association with long-term exposure (1 month: 1 month, 3 months: 1–3 months, 6 months: 1–6 months) to PM2.5. The model was adjusted for age at operation, sex, occupation type, ethnicity, marital status, length of hospitalization, smoking, and hospitalization days, smoking, and drinking. HRs: hazard ratios; PM2.5: fine particulate matter