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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: Reg Anesth Pain Med. 2014 Mar-Apr;39(2):89–96. doi: 10.1097/AAP.0000000000000035

Table 5.

Phantom Breast Pain

Perineural Infusion: Ropivacaine (n=30) Placebo (n=30) P-value
Prevalence (number of subjects reporting pain)
 POD 1 0 1 >0.999
 POD 4 1 2 >0.999
 POD 8 3 3 >0.999
 POD 28 5 5 >0.999
Incidence (times per day for each subject)
 POD 1 0 (0-0) 0 (0-0) §
 POD 4 0 (0-0) 0 (0-0) 0.560
 POD 8 0 (0–2) 0 (0-0) 0.632
 POD 28 0 (0–2) 0 (0–2) 0.875
Severity (Worst NRS previous 24 h)
 POD 1 0 (0-0) 0 (0-0) §
 POD 4 0 (0-0) 0 (0-0) 0.543
 POD 8 0 (0–1) 0 (0-0) 0.674
 POD 28 0 (0–4) 0 (0-0) 0.855
Severity (Average NRS previous 24 h)
 POD 1 0 (0-0) 0 (0-0) §
 POD 4 0 (0-0) 0 (0-0) 0.543
 POD 8 0 (0–1) 0 (0-0) 0.611
 POD 28 0 (0–1) 0 (0–1) 0.650

Values for pain severity are reported as median (10th–90th percentiles)

POD: postoperative day

§

A p-value could not be calculated due to only one non-zero datum

NRS: Numeric Rating Scale