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| Age (years) | n | Normal molecular karyotype ( %) | Abnormal molecular karyotype ( %) |
|---|---|---|---|
| <30 | 566 | 223 (39.4%) | 343 (60.6%) |
| 30-35 | 511 | 204 (40%) | 307 (60%) |
| >35 | 416 | 123 (29.6%) | 293 (70.4%)1,2 |
| Total | 1493 | 550 (36.8%) | 943 (63.2%) |
P=0.001 compared with <30-year-old group.
P=0.001 compared with <30-year-old group.
