ABSTRACT
Kelly's parity approach is used to estimate the number of live births averted at 6, 12 and 18 months after acceptance by 3,518 acceptors at nine Profamilia clinics in 1969. The calculated rates per thousand acceptors at 6, 12, and 18 months, respectively, are 137, 267, and 363. In order to obtain a general idea of the number of abortions averted by contraceptive use through the Profamilia program, Kelly's formula is also used, with modifications, to estimate the number of fetal losses (stillbirths and spontaneous and induced abortions) averted by the sample of users. It is estimated that 86 fetal losses per thousand acceptors are averted at 18 months postacceptance.
PIP: A follow-up study was conducted on 3,518 women who had visited the Columbian Profamilia clinics, returned at least once, and had pertinent data on their records. Kelly's parity approach method was used to determine how many births had been averted by these patients. This approach takes into account parity, continuation rates, and accidental pregnancy rates, while requiring fewer data than Potter's method. Results indicated that for every 1,000 acceptors, 267 births would be averted 1 year after acceptance and 363 overted 1 1/2 years after acceptance. In addition, 63 fetal losses would be averted in 1,000 acceptors 1 year after acceptance and 86 after 1 1/2 years.
