Table 4 Twin model associations between cortical volume, surface area and thickness of neocortical regions of interest (ROIs) and RRBI symptoms

Right lateral orbital sulcus

− 25.19

21.64

− 0.78

0.95

− 0.03

0.02

(18.5)

(17.93)

(8.86)

(9.59)

(0.016)

(0.02)

0.889

0.554

0.971

0.976

0.752

0.667

Left lateral orbital sulcus

− 10.35

47.58

− 6.75

2.47

0.00

0.06

(13.23)

(24.76)

(6.79)

(8.49)

(0.02)

(0.04)

0.895

0.246

0.971

0.976

0.999

0.42

Right middle frontal sulcus

− 62.16

− 5.56

− 23.66

5.97

0.00

− 0.003

(75.19)

(93.0)

(20.28)

(30.69)

(0.02)

(0.02)

0.895

0.962

0.971

0.976

0.999

0.91

Left middle frontal sulcus

− 46.91

27.27

− 3.27

3.45

− 0.01

− 0.01

(70.37)

(64.08)

(22.93)

(18.61)

(0.02)

(0.02)

0.895

0.894

0.971

0.976

0.924

0.715

Right orbital gyrus

19.63

138.56

7.07

9.8

− 0.01

0.05

(57.06)

(49.29)

(15.3)

(16.91)

(0.01)

(0.02)

0.931

0.178

0.971

0.976

0.923

0.056

Left orbital gyrus

97.56

− 3.72

11.84

− 7.86

0.004

0.019

(62.59)

(77.79)

(13.27)

(15.18)

(0.02)

(0.02)

0.714

0.962

0.971

0.976

0.984

0.667

Right middle frontal gyrus

83.36

285.63

10.68

95.29

0.01

− 0.02

(138.41)

(143.27)

(35.28)

(34.68)

(0.009)

(0.02)

0.895

0.246

0.971

0.072

0.924

0.608

Left middle frontal gyrus

− 11.56

87.38

18.94

13.73

− 0.01

− 0.001

(160.84)

(173.55)

(35.76)

(36.58)

(0.01)

(0.02)

0.944

0.854

0.971

0.976

0.923

0.955

Right inferior frontal orbital gyrus

61.59

− 25.2

10.41

− 10

0.02

0.07

(22.08)

(36.49)

(4.38)

(7.67)

(0.03)

(0.02)

0.190

0.840

0.564

0.769

0.924

0.065

Left inferior frontal orbital gyrus

6.15

30.12

1.05

0.84

0.01

0.02

(19.3)

(28.32)

(4.38)

(5.88)

(0.02)

(0.02)

0.931

0.609

0.971

0.976

0.924

0.667

Right anterior cingulate cortex

3.65

− 45.16

− 14.55

− 8.86

0.007

0.002

(51.55)

(90.27)

(24.12)

(26.81)

(0.02)

(0.01)

0.944

0.854

0.971

0.976

0.924

0.910

Left anterior cingulate cortex

74.36

64.47

15.22

5.2

0.005

0.019

(81.02)

(59.73)

(27.96)

(16.14)

(0.01)

(0.01)

0.895

0.609

0.971

0.976

0.926

0.416

Right postcentral gyrus

98.99

95.24

13.86

24.14

0.017

0.01

(85.47)

(51.44)

(23.53)

(19.86)

(0.02)

(0.02)

0.889

0.256

0.971

0.778

0.923

0.715

Left postcentral gyrus

53.83

− 20.69

25.34

− 1.88

0.007

0.005

(61.86)

(93.6)

(25.32)

(34.76)

(0.02)

(0.02)

0.895

0.900

0.971

0.976

0.926

0.828

Right postcentral sulcus

− 143.93

52.32

− 64.7

9.43

0.006

0.02

(90.46)

(66.92)

(36.76)

(29.48)

(0.01)

(0.008)

0.714

0.782

0.933

0.976

0.924

0.14

Left post central sulcus

58.03

− 71.79

17.06

− 27.95

0.003

0.015

(86.65)

(50.89)

(41.72)

(25.47)

(0.01)

(0.01)

0.895

0.525

0.971

0.778

0.984

0.416

Right precentral gyrus

− 45.01

− 22.53

− 7.78

20.51

− 0.003

− 0.02

(82.87)

(71.65)

(24.97)

(18.62)

(0.02)

(0.019)

0.900

0.900

0.971

0.778

0.984

0.482

Left precentral gyrus

− 78.17

62.85

5.9

32.14

− 0.011

− 0.019

(108)

(75.17)

(18.81)

(21.36)

(0.02)

(0.01)

0.895

0.764

0.971

0.596

0.924

0.143

Right inferior precentral sulcus

− 38.95

− 4.84

− 26.55

1.94

− 0.006

− 0.010

(51.56)

(51.05)

(20.55)

(19.71)

(0.017)

(0.016)

0.895

0.962

0.971

0.976

0.926

0.715

Left inferior precentral sulcus

26.8

− 13.62

− 0.84

− 9.55

− 0.002

0.013

(54.84)

(54.21)

(16)

(19.95)

(0.012)

(0.01)

0.900

0.900

0.971

0.976

0.984

0.550

Right superior precentral sulcus

49.29

− 23.56

10.74

0.85

0.014

− 0.021

(40.37)

(62.97)

(16.76)

(28.51)

(0.01)

(0.014)

0.886

0.900

0.971

0.976

0.923

0.453

Left superior precentral sulcus

12.3

62.67

13.56

15.89

0.0002

0.015

(44.33)

(46.71)

(20.63)

(19.52)

(0.010)

(0.011)

0.938

0.525

0.971

0.935

0.999

0.482

Right central sulcus

17.46

59.85

9

29.72

− 0.006

− 0.008

(73.4)

(44.51)

(32.77)

(18.95)

(0.007)

(0.007)

0.942

0.525

0.971

0.596

0.923

0.607

Left central sulcus

5.45

38.7

− 5.28

16.56

− 0.001

− 0.005

(37.96)

(64.97)

(17.64)

(33.12)

(0.009)

(0.008)

0.942

0.854

0.971

0.976

0.988

0.715

Right superior frontal sulcus

− 27.93

269.97

− 21.4

81.83

0.018

0.011

(146.59)

(129.92)

(45.76)

(37.33)

(0.009)

(0.014)

0.942

0.246

0.971

0.256

0.752

0.667

Left superior frontal sulcus

14.56

108.86

− 11.46

30.68

0.012

0.005

(104.96)

(90.84)

(36.81)

(28.44)

(0.009)

(0.012)

0.942

0.554

0.971

0.778

0.923

0.746

Right superior frontal gyrus

63.05

237.18

− 5.09

66.53

0.011

0.007

(158.88)

(121.69)

(45.05)

(34.86)

(0.011)

(0.009)

0.931

0.246

0.971

0.406

0.923

0.698

Left superior frontal gyrus

− 278.67

− 363.82

− 96.72

− 130.44

0.017

0.028

(156.8)

(187.75)

(44.93)

(47.07)

(0.009)

(0.012)

0.714

0.246

0.564

0.072

0.752

0.143

Right supramarginal gyrus

134.4

21.49

− 3.27

15.28

0.030

0.012

(107.4)

(93.84)

(23.98)

(35.15)

(0.026)

(0.025)

0.889

0.900

0.971

0.976

0.923

0.746

Left supramarginal gyrus

− 152.85

− 248.39

− 34.84

− 53.37

− 0.007

− 0.012

(97.63)

(119.75)

(39)

(35.18)

(0.015)

(0.019)

0.714

0.246

0.971

0.596

0.924

0.715

Right superior parietal gyrus

− 52.18

− 62.3

7.1

− 24.15

− 0.01541

0.011

(103.56)

(111.09)

(29.1)

(33.94)

(0.01462)

(0.011)

0.900

0.8541

0.9709

0.9763

0.9228

0.6287

Left superior parietal gyrus

− 58.84

53.91

36.09

1.72

− 0.024

− 0.002

(93.96)

(201.92)

(31.37)

(52.12)

(0.025)

(0.021)

0.8951

0.900

0.971

0.976

0.923

0.942

Right intraparietal sulcus

38.48

− 169.78

15.22

− 120.61

0.011

0.037

(111.05)

(88.27)

(53.82)

(39.45)

(0.011)

(0.010)

0.931

0.246

0.971

0.072

0.923

0.012

Left intraparietal sulcus

− 51.43

97.68

− 26.31

25.49

0.008

0.018

(80.57)

(95.6)

(36.84)

(47.17)

(0.009)

(0.011)

0.895

0.614

0.971

0.976

0.923

0.416

Right angular gyrus

− 284.76

150.72

− 61.86

− 32.72

− 0.020

0.055

(150.54)

(114.9)

(38.01)

(38.6)

(0.023)

(0.028)

0.714

0.525

0.933

0.935

0.923

0.244

Left angular gyrus

− 113.07

71.55

− 1.29

25.98

− 0.019

− 0.027

(146.84)

(128.96)

(35.37)

(29.82)

(0.029)

(0.028)

0.895

0.854

0.971

0.935

0.924

0.658