Table 3 Proportion of perinatal and demographic variables present in the Birth Registry for linked subjects (N = 2,694) per birth year
Birth Year | Number of subjects | Birth weight | Gestational age | Type of birth | Number of livebirths | Residential district | Father’s place of birth | Mother’s place of birth | Father’s age | Mother’s age |
|---|---|---|---|---|---|---|---|---|---|---|
1961 | 155 | 0 | 0 | 0 | 100 | 0 | 0 | 0 | 0 | 0 |
1962 | 158 | 0 | 0 | 1.3 | 100 | 0 | 1.3 | 1.3 | 1.3 | 1.3 |
1963 | 182 | 0 | 0 | 100 | 100 | 0 | 98.9 | 99.5 | 98.9 | 100 |
1964 | 203 | 0 | 0 | 100 | 100 | 0 | 99.0 | 100 | 0.5 | 0.5 |
1965 | 178 | 100 | 100 | 99.4 | 73.6 | 98.3 | 97.8 | 99.4 | 98.9 | 100 |
1966 | 209 | 100 | 100 | 100 | 68.4 | 99.5 | 98.6 | 99.5 | 98.6 | 99.5 |
1967 | 197 | 100 | 100 | 98.0 | 64.0 | 96.5 | 97.0 | 97.5 | 97.5 | 98.0 |
1968 | 195 | 100 | 100 | 99.0 | 64.1 | 99.0 | 99.5 | 98.0 | 99.5 | 99.5 |
1969 | 196 | 100 | 100 | 95.4 | 60.7 | 94.9 | 91.8 | 94.4 | 93.4 | 95.4 |
1970 | 209 | 99.5 | 99.5 | 100 | 100 | 99.5 | 97.6 | 99.0 | 98.4 | 99.0 |
1971 | 193 | 100 | 100 | 100 | 100 | 99.0 | 98.5 | 100 | 98.5 | 100 |
1972 | 194 | 100 | 100 | 99.5 | 99.5 | 99.0 | 96.4 | 98.5 | 96.9 | 99.5 |
1973 | 208 | 100 | 100 | 99.0 | 99.0 | 98.6 | 97.6 | 99.0 | 97.6 | 99.0 |
1974 | 217 | 100 | 100 | 3.2 | 98.6 | 97.2 | 99.1 | 99.5 | 98.6 | 99.5 |