Table 3 The results of the two-piecewise linear model.

From: Lesion size affects the risk of technical difficulty in gastric endoscopic submucosal dissection

Exposure

Difficult ESD (OR, 95% CI)

P-value

Fitting model by standard linear regression

1.07 (1.03, 1.12)

 < 0.001

Fitting model by two-piecewise linear regression

The inflection point of lesion size (mm)

40

 

   < 40

1.13 (1.06, 1.20)

 < 0.001

   ≥ 40

0.95 (0.85, 1.06)

0.339

Difference in two-piecewise effect

0.85 (0.73, 0.98)

0.028

P for log-likelihood ratio test

0.027

 
  1. Adjusted: age, gender, location (upper, middle, and lower), gross type (elevated, flat, and depressed), surface configuration (erythema, ulcer, and nodularity), submucosal fibrosis (no and yes), and invasion depth (mucosa and non-mucosa).
  2. ESD endoscopic submucosal dissection, CI confidence interval, OR odds ratio.
  3. The p < 0.05 is considered to be statistically significant.
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