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Table 1 Subject characteristics at baseline

From: Is treated HIV infection associated with knee cartilage degeneration and structural changes? A longitudinal study using data from the osteoarthritis initiative

  All subjects (n = 30) HIV group (n = 10) Control group (n = 20) P valuea
Age, mean ± SD years 52.1 ± 6.2 52.2 ± 6.9 52.0 ± 6.0 0.940
Females [n (%)]/Males [n (%)] 9 (30%) / 21 (70%) 3 (30%) / 7 (70%) 6 (30%) / 14 (70%) 1.000
BMI, mean ± SD kg/m2 27.6 ± 3.7 27.4 ± 3.6 27.7 ± 3.8 0.831
Knee Kellgren-Lawrence scores     1.000
 Grade 0 [n (%)] 27 (45%) 9 (45%) 18 (45%)  
 Grade 1 [n (%)] 12 (20%) 4 (20%) 8 (20%)  
 Grade 2 [n (%)] 15 (25%) 5 (25%) 10 (25%)  
 Grade 3 [n (%)] 6 (10%) 2 (10%) 4 (10%)  
Racial composition     1.000
 White or Caucasian [n (%)] 12 (40%) 4 (40%) 8 (40%)  
 Black or African American [n (%)] 18 (60%) 6 (60%) 12 (60%)  
  1. Continuous data were expressed as mean ± SD. Categorical data were presented in numbers of participants with percentage in parentheses. a P-values were calculated using either Pearson’s χ2-test or independent t-test as appropriate