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Table 1 Distribution by zygosity, sex, THA and vital status

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

THA by zygosity

Distribution by sex

Distribution by vital status

Zygosity

Males (n)

Females (n) (%)

Total by sex (n)

Males alive (n)

Males dead (n)

Females alive (n)

Females dead (n)

Total by vital status (n)

MZ + THA

88

90 (51)

178

71

17

72

18

178

MZ – THA

9861

10,288 (51)

20,149

8671

1190

9059

1229

20,149

DZ + THA

184

189 (51)

373

141

43

155

34

373

DZ – THA

18,015

16,975 (49)

34,990

15,417

2598

14,486

2489

34,990

OS + THA

135

149 (52)

284

120

16

136

12

284

OS – THA

19,005

19,084 (50)

38,089

17,491

1514

17,892

1192

38,089

Total

47,288

46,775 (50)

94,063

41,911

5378

41,799

4974

94,063

  1. DZ same-sex dizygotic, MZ monozygotic, OS opposite-sex dizygotic, + THA Total hip arthroplasty, – THA No hip arthroplasty