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Table 1 Comparison of median amino acid lengths between transmission strains and controls

From: Application of a case–control study design to investigate genotypic signatures of HIV-1 transmission

   Control median (mean) amino acid length Case median (mean) amino acid length Wilcoxon Rank-Sum p-value
V1 Loop     
Subtype B n = 78 25.5 (26.9) 25.5 (26.9) 0.87
Subtype C n = 55 25 (26.8) 23 (23.5) 0.047
V2 Loop     
Subtype B n = 78 36.5 (37.4) 37 (38.1) 0.292
Subtype C n = 55 38 (38.8) 37 (37.6) 0.166
V3 Loop     
Subtype B n = 78 28 (27.9) 28 (27.7) 0.031
Subtype C n = 55 28 (28.0) 28 (27.9) 0.104
V4 Loop     
Subtype B n = 78 20 (19.8) 19.5 (20.2) 0.829
Subtype C n = 55 16 (15.5) 15 (15.5) 0.513