Table 2. Familial correlation coefficients and standard error for EC among the various familial pairs.
| Populations | Large pedigrees | Extended pedigree | ||||||||
| Chaoshan | Taihang | Chaoshan | Taihang | |||||||
| Pairs | Correlation Coefficient | Pairs | Correlation Coefficient | Pairs | Correlation Coefficient | Pairs | Correlation Coefficient | Pairs | Correlation Coefficient | |
| Parent-offspring | 10234 | 0.022 (0.013) | 10876 | 0.039 (0.013) | 90 | 0.171 (0.103) | 176 | 0.191 (0.067) | 218 | 0.195 (0.044) |
| Father-son | 2812 | 0.026 (0.015) | 2507 | 0.062 (0.027) | 27 | −0.073 (0.249) | 48 | 0.208 (0.076) | 118 | 0.263 (0.079) |
| Father-daughter | 2305 | 0.029 (0.014) | 2931 | 0.042 (0.029) | 18 | 0.080 (0.023) | 40 | 0.235 (0.078) | 101 | 0.253 (0.094) |
| Mother-son | 2812 | 0.048 (0.028) | 2507 | 0.061 (0.026) | 27 | 0.606 (0.148) | 48 | 0.160 (0.053) | 118 | 0.101 (0.074) |
| Mother-daughter | 2305 | 0.011 (0.008) | 2931 | 0.046 (0.029) | 18 | 0.125 (0.071) | 40 | 0.148 (0.093) | 101 | 0.178 (0.111) |
| Sib-sib | 6365 | 0.102 (0.029) | 8965 | 0.140 (0.020) | 67 | 0.261 (0.178) | 108 | 0.249 (0.108) | 328 | 0.298 (0.127) |
| Brother-brother | 1854 | 0.149 (0.033) | 2033 | 0.171 (0.032) | 23 | 0.488 (0.237) | 38 | 0.338 (0.102) | 80 | 0.159 (0.198) |
| Brother-sister | 3168 | 0.107 (0.025) | 4544 | 0.136 (0.024) | 35 | 0.217 (0.179) | 58 | 0.237 (0.100) | 186 | 0.316 (0.098) |
| Sister-sister | 1343 | 0.079 (0.038) | 2388 | 0.102 (0.026) | 9 | −0.200 (0.260) | 22 | 0.235(0.112) | 62 | 0.416 (0.233) |
| Avuncular | 15531 | 0.006 (0.002) | 12487 | 0.005 (0.002) | 174 | ******* | 156 | 0.074 (0.016) | 1086 | 0.021 (******) |
| Cousin | 18247 | 0.007 (0.002) | 12092 | 0.008 (0.003) | 213 | ******* | 96 | 0.084 (0.024) | 1635 | 0.057 (0.087) |
*******: Value is not estimable.