Table 5 Joint effect of FEV1%pred and DLco %pred for the relative risk for overall PPCs.

From: Preoperative DLco and FEV1 are correlated with postoperative pulmonary complications in patients after esophagectomy

 

Crude

Adjusteda

IPTW

High DLco %pred & high FEV1%pred

Reference

Reference

Reference

High DLco %pred & low FEV1%pred

1.66 (1.02–2.59)

1.46 (0.96–2.20)

1.48 (0.95–2.33)

Low DLco %pred & high FEV1%pred

2.40 (1.58–3.56)

2.06 (1.42–2.99)

2.16 (1.51–3.10)

Low DLco %pred & low FEV1%pred

2.77 (1.74–4.25)

2.30 (1.53–3.44)

2.29 (1.54–3.40)

  1. Data are presented as a ratio (95% confidence interval).
  2. Cutoff values of low DLco %pred and low FEV1%pred are 72 and 78 respectively.
  3. PPCs, postoperative pulmonary complications; FEV1, forced expiratory volume in 1 s; %pred, %predicted; Quintile 1, the lowest quintile; Quintile 5, the top quintile; DLco, diffusing capacity of the lung for carbon monoxide, IPTW, inverse probability treatment weight.
  4. aAdjusted for age, sex, body mass index, smoking status (never and ever), chronic pulmonary disease, cardiovascular disease, albumin, pathologic stage (I, II, and III), tumor location (cervical/upper thoracic, middle thoracic, and lower thoracic/esophagogastric junction), type of surgery (open thoracotomy, video-assisted thoracoscopic, and robotic surgery), lymph node dissection (two-field or less and three-field), operation time.
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