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Table 1 Patient demographics

From: Fourth-generation ceramic-on-ceramic THA results in improvements in midterm outcomes compared to third-generation THA but does not resolve noise problems: a cohort study of a single-hip system

Characteristics Forte COC (n = 310) Delta COC (n = 292) p value
Number of patients (hips) 248 (310) 234 (292)  
Agea (years) 50.7 (18–79) 50.5 (18–83) 0.838
Sexc 0.204
 Male 116 (47) 123 (53)
 Female 132 (53) 111 (47)
Affected sideb 0.902
 Right 163 (53) 155 (53)
 Left 147 (47) 137 (47)
BMIa (kg/m2) 23.3 (16.9–39.3) 23.5 (16.8–37.9) 0.461
Primary diagnosisb 0.895
 ONFH 167 (54) 155 (53)
 Hip dysplasia 55 (18) 47 (16)
 Osteoarthritis 49 (16) 54 (18)
 Post-traumatic arthritis 9 (3) 5 (2)
 Sequelae of pyogenic arthritis 11 (3) 8 (3)
 Sequelae of LCP disease 9 (3) 12 (4)
 Rheumatoid arthritis 8 (2) 9 (3)
 Ankylosing spondylitis 2 (1) 2 (1)
Cup sizea (mm) 53.9 (46–62) 54.4 (46–64) 0.324
Femoral head sizeb
 28 mm 87 (28)  
 32 mm 223 (72) 43 (15)
 36 mm 249 (85)
Duration of follow-upa (years) 6.7 (5–10.2) 5.5 (5–7.4)
  1. a The values are given as the average, with the range in parentheses
  2. b The values are given as the number of hips, with the percentage in parentheses
  3. c The values are given as the number of patients, with the percentage in parentheses
  4. COC ceramic-on-ceramic, BMI body mass index, ONFH osteonecrosis of the femoral head, LCP Legg-Calve-Perthes