Ectopic pregnancy, the need for standardisation of rate

Trend of ectopic pregnancy and its main determinants in Hamadan province, Iran (2000-2010)

Background

Ectopic pregnancy remains a major gynaecologyical problem in contemporary gynaecological practice. The purpose of this study was to determine the incidence and some risk factors of ectopic pregnancy in Hamadan province during 2000-2010.

Methods

This was a retrospective descriptive study carried out at hospitals in Hamadan provience, Iran. A total of 872 women with the diagnosis of ectopic pregnancy between 2000 to 2010 were recruited. At initial assessment, 872 medical records were targeted for the assessment, while because of incompleteness of some recorded information, 521 files were finally assessed.

Results

The overall incidence of ectopic pregnancy was estimated to be 2.6 per 1000 recorded pregnancies. While, considerably increased from 1.5 per 1000 pregnancy in 2000 to 4.8 per 1000 pregnancies in 2010. More than half of the women aged 25 to 34 years. 48.2% of selected women were using contraception methods. 5.2%, 14.0% and 5.6% of women had pervious ectopic pregnancy, first or second infertility and pelvic inflammatory diseases, respectively.

Conclusion

Increasing trend of the incidence of ectopic pregnancy is expected due to development and availability of minute diagnostic approaches and also some baseline amendable (contraceptive methods and surgical interventions) and unchangeable (age of pregnancy and residency) parameters.

Reporting rates of ectopic pregnancy: are we any closer to achieving consensus?

Calculating rates of ectopic pregnancy in a reliable and reproducible way can be challenging. To date, there is no consensus as to which denominators to use but the authors suggest using the total number of deliveries as a benchmark. In many developing countries where ectopic pregnancy is a major cause of maternal morbidity and mortality, standardisation of epidemiological data is arguably even more important. Using the number of deliveries is probably the most pragmatic and reliable way of quoting ectopic pregnancy rates in developing countries, as structures are usually already in place to record births/deliveries. This would ensure greater consistency and allow more meaningful comparisons to be made, both within individual units over time as well as globally. Using additional denominators is more labour intensive and lends itself to inaccuracy but may nevertheless be useful depending on the issues being addressed. Ultimately, the correct denominator(s) to use should be determined by the clinical question(s) of interest. The authors acknowledge that the statistical analysis used in this paper is based on one retrospective study alone and that further work is required in this area before definitive conclusions can be made.

Ectopic pregnancy and emergency contraceptive pills: a systematic review

OBJECTIVE

To evaluate the existing data to estimate the rate of ectopic pregnancy among emergency contraceptive pill treatment failures.

DATA SOURCES

Our initial reference list was generated from a 2008 Cochrane review of emergency contraception. In August 2009, we searched Biosys Previews, the Cochrane Database of Systematic Reviews, Medline, Global Health Database, Health Source: Popline, and Wanfang Data (a Chinese database).

METHODS

This study included data from 136 studies, which followed a defined population of women treated one time with emergency contraceptive pills (either mifepristone or levonorgestrel) and in which the number and location of pregnancies were ascertained.

RESULTS

Data from each article were abstracted independently by two reviewers. In the studies of mifepristone, 3 of 494 (0.6%) pregnancies were ectopic; in the levonorgestrel studies, 3 of 307 (1%) were ectopic.

CONCLUSION

The rate of ectopic pregnancy when treatment with emergency contraceptive pills fails does not exceed the rate observed in the general population. Because emergency contraceptive pills are effective in lowering the risk of pregnancy, their use will reduce the chance that an act of intercourse will result in ectopic pregnancy.

LEVEL OF EVIDENCE

III.

Ectopic pregnancy and pelvic inflammatory disease: a renewed epidemic?

OBJECTIVE

The incidence of ectopic pregnancy (EP) was reported to rise during the 1970s and 1980s; thereafter it remained stable or even declined. We studied whether changes in the incidence of pelvic inflammatory disease (PID) have had an impact on the incidence of EP and we hypothesise about the incidence of EP in the near future.

STUDY DESIGN

EP and PID hospital admissions from 1980 to 2005 were derived from Dutch Medical Registries and incidence trends were calculated and analysed by joinpoint regression.

RESULTS

The peak incidence of EP in 1988 (11/1000 live births) was preceded by a peak incidence of admissions for PID in 1983 (0.6/1000 women of all ages). The EP rate declined towards 2005 (7.3/1000 live births) mainly due to a decrease in EP in urban regions and in older aged women (> or =35 years). Presently, women <25 years and born between 1985 and 1990 are again at an increased risk of EP (12/1000 live births) but this rise was not preceded by a peak incidence of admissions for PID.

CONCLUSION

On a population level, the peak incidence of EP in The Netherlands was preceded by a peak incidence of PID. A renewed rise in the incidence of EP is observed for young women. This may be related to the significant increase in positive tests for genital Chlamydia trachomatis during recent years.