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Table 1 Patients’ characteristics by puncture approach at baseline

From: Phrenic nerve block caused by interscalene brachial plexus block: breathing effects of different sites of injection

Patient characteristic Anterior puncture approach Posterior puncture approach
  Ntotal = 42 Ntotal = 42
Nfemales (%) 12 (29 %) 13 (31 %)
Median age [years] 51 50
(Q1, Q3) (43, 56) (41, 56)
Median Body Mass Index [kg/m2] 26 28
(Q1, Q3) (25, 29) (25, 31)
Nsurgical procedure (%)
 Arthroskopic labrum refixation 23 (55) 22 (52)
 Open labrum refixation 13 (31) 13 (31)
 Other 6 (14) 7 (17)
Ndiagnosis (%)
 Tendinosis calcacera 14 (33) 18 (43)
 Lesion of the rotator cuff 16 (38) 13 (31)
 Bankart lesion 10 (24) 6 (14)
 Other 2 (5) 5 (12)
Median spirometry variables at baseline (Q1, Q3)
 VC [l] 5.09 (3.98, 5.58) 4.46 (3.90, 5.37)
 FEV1 [l/s] 3.8 (3.34, 4.33) 3.57 (3.01, 4.11)
 Sniff PmaxPeak [kPa] 6.24 (4.84, 7.67) 6.25 (5.09, 8.63)