TABLE I

Comparability of groups of women given information about prenatal testing. Values are numbers (percentages) unless otherwise indicated

Control (n=567)Individual Information (n=561)Information in classes (n=563)
Mean (SD) age (years)28 (5.4)28 (5.3)28 (5.3)
Mean (SD) gestational age at entry (weeks)12 (1.9)12 (1.8)12 (2.0)
Parous285/558 (51)267/557 (48)260/559 (47)
Non-white75/564 (13)88/559 (16)80/562 (14)
Non-manual social class:
Mother289/538 (54)318/541 (59)308/541 (57)
Father240/504 (48)256/503 (51)245/504 (49)
From clinics in Bradford232/567 (41)230/561 (41)235/563 (42)
Attendance at extra information sessions:
Withdrew (miscarriage or changed mind)41/567 (7.2)38/561 (6.8)49/563 (8.7)
Pregnant and in trial at time of appointment526523514
Attended appointmentN/A319 (61)218 (42)