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Table 3 Prevalences, tetrachorics, case-wise concordance rates, heritability, biometric models and chi-squared test statistics

From: Probability and heritability estimates on primary osteoarthritis of the hip leading to total hip arthroplasty: a nationwide population based follow-up study in Danish twins

Model MZ prevalence DZ prevalence MZr DZr MZcw DZcw Heritability Variance component estimates Chisquare test statistics AIC
A D C E LL Chisquare df p
Men                 
 Saturated 0.06 0.06 0.80 (0.57–0.91) 0.41 (0.09–0.65) 0.51 (0.33–0.70) 0.21 (0.10–0.40) 0.78 (0.07–0.99) –621.44   6   1254.88
 ACE 0.06 0.06 0.80 (0.57–0.91) 0.41 (0.09–0.65) 0.51 (0.33–0.70) 0.21 (0.10–0.40) 0.78 (0.07–0.99) 0.78 (0.07–0.99) 0.02 (0.00–1.0) 0.20 (0.08–0.41) –621.44   6   1254.88
 ADE 0.06 0.06 0.80 (0.58–0.91) 0.40 (0.32–0.47) 0.51 (0.34–0.69) 0.21 (0.16–0.26) 0.80 (0.60–0.91) 0.80 (0.60–0.91) 0.00 (0.00–1.00) 0.20 (0.09–0.40)      1255.30
 AE 0.06 0.06 0.80 (0.58–0.91) 0.40 (0.32–0.47) 0.51 (0.34–0.69) 0.21 (0.16–0.26) 0.80 (0.60–0.91) 0.80 (0.60–0.91) 0.20 (0.09–0.40) –621.65 0.42 2 0.81  
 CE 0.07 0.07 0.63 (0.44–0.76) 0.63 (0.44–0.76) 0.37 (0.26–0.50) 0.37 (0.26–0.50) 0.63 (0.46–0.77) 0.37 (0.23–0.54) –2921.4 4600 2 <0.0001  
Women     
 Saturated 0.06 0.06 0.72 (047–0.87) 0.46 (0.15–0.69) 0.42 (0.25–0.61) 0.23 (0.11–0.43) 0.52 (0.07–0.94) –621.44   6   1254.88
 ACE 0.06 0.06 0.72 (0.47–0.87) 0.46 (0.15–0.69) 0.42 (0.25–0.61) 0.23 (0.11–0.43) 0.52 (0.07–0.94) 0.52 (0.07–0.94) 0.20 (0.006–0.91 0.28 (0.13–0.50) –621.44   6   1254.88
 ADE 0.06 0.06 0.74 (0.52–0.87) 0.37 (0.28–0.45) 0.44 (0.28–0.61) 0.18 (0.14–0.24) 0.74 (0.54–0.87) 0.74 (0.54–0.87) 0.00 (0.00–1.00)   0.26 (0.13–0.46)      1255.30
 AE 0.06 0.06 0.74 (0.52–0.87) 0.37 (0.28–0.45) 0.44 (0.28–0.61) 0.18 (0.14–0.24) 0.74 (0.54–0.87) 0.74 (0.54–0.87) 0.26 (0.13–0.46) –621.65 0.42 6 0.81  
 CE 0.07 0.07 0.66 (0.48–0.79) 0.66 (0.48–0.79) 0.37 (0.26–0.50) 0.37 (0.26–0.50) 0.66 (0.50–0.79) 0.34 (0.21–0.50) –2921.4 4600 2 <0.0001  
Sex-adjusted     
 Saturated 0.06 0.06 0.68 (0.55–078) 0.45 (0.23–0.62) 0.39 (0.30–0.50) 0.23 (0.14–0.36) 0.47 (0.12–0.85) –806.7   2   1621.34
 ACE 0.06 0.06 0.68 (0.55–0.78) 0.45 (0.23–0.62) 0.39 (0.30–0.50) 0.23 (0.14–0.36) 0.47 (0.12–0.85) 0.47 (0.12–0.85) 0.22 (0.02–0.76) 0.31 (0.21–0.44) –806.7 4   1621.34
 ADE 0.06 0.06 0.70 (0.57–0.80) 0.35 (0.29–0.40) 0.41 (0.31–0.51) 0.18 (0.15–0.21) 0.70 (0.58–0.79) 0.70 (0.58–0.80) 0.00 (0.00–0.00) 0.30 (0.21–0.42)      1622.31
 AE 0.06 0.06 0.70 (0.58–0.79) 0.35 (0.29–0.40) 0.41 (0.31–0.51) 0.18 (0.15–0.21) 0.70 (0.58–0.79) 0.70 (0.58–0.79) 0.30 (0.21–0.42) –807.2 0.97 1 0.325  
 CE 0.07 0.07 0.62 (0.51–0.71) 0.62 (0.51–0.71) 0.37 (0.29–0.45) 0.37 (0.29–0.45) 0.62 (0.52–0.72) 0.38 (0.28–0.48) –2913.8 4214 1 <0.0001  
  1. A Additive genetic, AIC Akaiki’s information criterion, C Common environment, D Dominant genetic, DZcw Dizygotic case-wise concordance rate, DZr Dizygotic correlation, E Unique environment, MZcw Monozygotic case-wise concordance rate, MZr Monozygotic correlation, Saturated Saturated model not including censoring