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. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: Anesth Analg. 2021 Jul 1;133(1):32–40. doi: 10.1213/ANE.0000000000005368

Table 1:

Segmented mixed-effects logistic regression model for PNB use

Characteristic Lumpectomy Mastectomy
OR 95% CI P value OR 95% CI P value
Per year increase (year of procedure < 2014) 1.08 0.84 – 1.39 0.55 0.87 0.71 – 1.07 0.19
Per year increase (year of procedure ≥ 2014) 2.03 1.81 – 2.27 <0.001 2.24 2.00 – 2.49 <0.001

Footnote: Comparisons of post-2014 vs pre-2014 slopes (i.e., interaction term): For lumpectomy: p<0.001; for mastectomy: p<0.001.

Univariable mixed-effects logistic regression clustering on facility ID, with PNB status as outcome. ASA PS = American Society of Anesthesiologists Physical Status; CI = confidence interval; OR = odds ratio; PNB = peripheral nerve block.