Skip to main content

Table 2 Concordance and tetrachoric correlations

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

Zygosity Concordant pairs with THA due to OA n (%) Discordant pairs with THA due to OA n (%) Concordant pairs without THA n (%) Total twin pairs in zygosity groups n (%) Tertrachoric correlations (rho)
MZM 10 (0.2) 57 (1.2) 4558 (98.6) 4625 (100) 0.70
DZM 5 (0.1) 148 (1.8) 8107 (98.1) 8260 (100) 0.33
MZF 9 (0.2) 72 (1.5) 4773 (98.3) 4855 (100) 0.66
DZF 5 (0.1) 148 (1.9) 7740 (98.0) 7893 (100) 0.33
OSDZ 7 (0.05) 223 (1.25) 17,602 (98.7) 17,832 (100) 0.41
  1. DZF dizygotic females, DZM dizygotic males, MZF monozygotic females, MZM monozygotic males, OA Osteoarthritis, OSDZ opposite-sex dizygotic twin pairs, THA Total hip arthroplasty