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Table 1 Clinical characteristics of the study population

From: Tolerability of IM penicillin G benzathine diluted or not with local anesthetics, or different gauge needles for syphilis treatment: a randomized clinical trial

  Group 1, anaesthesia /long 19G needle
n = 27
Group 2, anaesthesia /short 21G needle
n = 28
Group 3, no anaesthesia/long 19G needle
n = 25
Group 4, no anaesthesia/short 21G needle
n = 28
Total
n = 108
Gender male (%) 27 (100) 26 (92.9) 23 (92) 26 (92.9) 102 (94.5)
Age (years) 34.2 (10.5) 36.1 (8.7) 39.0 (10.6) 37.5 (14.1)  
BMI (kg/m2), SD 23.8 (3.8) 24.9 (4.9) 25.6 (3.9) 23.9 (2.8)  
Ethnicity (%)
 Caucasic 17 (63) 22 (78.6) 18 (72) 22 (78.6) 79 (73.1)
 Latin 7 (25.9) 6 (21.4) 5 (20) 5 (17.9) 23 (21.3)
 Black 1 (3.7) 0 (0.0) 2 (8.0) 1 (3.6) 4 (3.7)
 Other 2 (7.4) 0 (0.0) 0 (0.0) 0 (0.0) 2 (1.8)
HIV infection 12 (44.4) 12 (42.9) 12 (48) 9 (32.1) 45 (41.7)
Center
 Sandoval 19 (70.4) 20 (71.4) 18 (72) 19 (67.9) 76 (70.4)
 HCSC 8 (29.6) 8 (28.6) 7 (28) 9 (32.1) 32 (29.6)