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Table 2 Twins participating in COTASS-2

From: The Colombo Twin and Singleton Follow-up Study: a population based twin study of psychiatric disorders and metabolic syndrome in Sri Lanka

Zygosity

Number of Individual

Number of Twin Families

Monozygotic Males (MZM)

533

295

Dizygotic Males (DZM)

366

215

Monozygotic Females (MZF)

730

397

Dizygotic females (DZF)

485

281

Dizygotic Opposite Sex (DZOS)

809

467

Triplets

11

5

Zygosity missing

1

–

  1. Number of individuals in the twin groups is not twice the number of families due to missing data. Actual numbers of ‘complete pairs’ are not given since those differ per variable