Table 2.
Number of different types of consanguineous mating and mean of inbreeding coefficient (α) among the parents of each group of patients, total patients, and control group
| Type of marriage | Type of disease | |||||
|---|---|---|---|---|---|---|
| Intermittent or constant exotropia | Infantile esotropia | Non-accommodative acquired esotropia | Accommodative acquired esotropia | Total patients | Control group | |
| Double first cousin | 1 | 0 | 0 | 0 | 1 | 0 |
| First cousin | 56 | 35 | 68 | 15 | 174 | 99 |
| Cousins once removed | 2 | 2 | 3 | 0 | 7 | 8 |
| Second cousins | 24 | 8 | 21 | 5 | 58 | 29 |
| Unrelated marriages | 89 | 39 | 70 | 23 | 221 | 285 |
| Total | 172 | 84 | 162 | 43 | 461 | 421 |
| Mean of inbreeding coefficient (α) | 0.0236 | 0.0283 | 0.0288 | 0.0236 | 0.0263 | 0.0164 |