Table 1 Participant characteristics

From: Twin pair analysis uncovers links between DNA methylation, mitochondrial DNA quantity and obesity

N (twin pairs, singletons)

173 (86, 1)

MZ / DZ (full twin pairs)

163 (81) / 10 (5)

Age, mean (range)

45.7 (22.8–69.3)

Female, %

59.0

Smoking, %

Never 39.3

Current 30.1

Former 30.6

Obesity-related measures, Mean (range) SD

Weight (kg)

83.7 (48.7–143.6) 18.3

BMI (kg/m2)

29.2 (19.7–45.9) 5.8

Waist circumference (cm)

97.6 (65.2–144.3) 15.7

WHR

0.9 (0.8–1.1) 0.1

Fat (%)

36.6 (8.9–57.3) 9.6

Fat (kg)

31.9 (7.4–66.0) 13.0

Fat-free mass (kg)

49.8 (29.5–76.7) 10.8

Intra-abdominal fat (cm3)

1015 (152–3950) 870

Subcutaneous fat (cm3)

4582 (827–15,129) 2830

Adipocyte volume (mm3)

539 (123–1131) 218

Liver fat (%)

2.7 (0.1–22.4) 4.0

Total cholesterol (mmol/l)

4.8 (2.7–7.7) 0.9

HDL (mmol/l)

1.5 (0.5–3) 0.5

LDL (mmol/l)

3 (1–5.1) 0.8

Triglycerides (mmol/l)

1 (0.3–5.9) 0.6

hsCRP (mg/l)

2.3 (0.1–9.7) 2.3

Adipsin (µg/ml)

1.2 (0.7–1.7) 0.2

Adiponectin (ng/ml)

3320 (1310–7710) 1408

ALAT (U/l)

29.3 (14–127) 20.1

ASAT (U/l)

29.2 (7–131) 14.3

Systolic blood pressure (mmHg)

133 (97–195) 19

Diastolic blood pressure (mmHg)

80 (48–110) 78

Fasting glucose (mmol/l)

5.6 (4.0–16.1) 1.1

Fasting insulin (mU/l)

8.1 (0.9–34.3) 5.9

HOMA-IR

2.1 (0.2–9.9) 1.8

Matsuda index

6.7 (0.7–34.2) 4.9

Physical activity measures (Baecke scale), Mean (SD)

Leisure-time physical activity

2.9 (0.6)

Sports activity

2.7 (0.9)

Work activity

2.5 (1.0)

Total activity

8.1 (1.5)

  1. ALAT Alanine aminotransferase, ASAT Aspartate aminotransferase, BMI body mass index, DZ dizygotic, HOMA-IR Homeostatic model assessment for insulin resistance, hsCRP high-sensitivity C-reactive protein, MZ monozygotic, WHR waist-to-hip ratio.