[An epidemiological survey on intrauterine device downward dislocation in Chinese rural users].
OBJECTIVE
To understand the situation of downward dislocation of intrauterine device (IUD) and the impact related to the effectiveness of HJD use, in China.


METHODS
An epidemiological survey with cross-sectional, retrospective and prospective study designs was conducted to investigate 18,922 IUD users who were selected by a multi-phase stratified cluster sampling method.


RESULTS
IUD's downward dislocation had been an important unsuccessful issue related to the IUD insertion that accounted for 20% of total the cases of failure. The top three failure outcomes would include extrusion, removal due to downward dislocation and unintended pregnancy. Respectively, the cumulative rates and the ranking due to IUD failure (per 100 women) in the first, third, sixth and twelfth month were shown as follows: extrusion appeared as 0.33%, 1.13%, 2.21% and 4.30%; removal as 0.10%, 0.37%, 0.80% and 2.34%; while unintended pregnancy were 0.03%, 0.14%, 0.41% and 1.14%.


CONCLUSIONS
IUD's downward dislocation made great impact on the effectiveness of IUD use that should call for attention from relative governmental sectors and researchers in the areas of prevention, diagnosis and treatment.
Zhou
Jie
J
Institute for Health and Development Studies, Kunming Medical College, Kunming 650031, China.
Deng
Rui
R
Zhang
Kai-ning
KN
Wu
Shang-chun
SC
Lei
Zhen-wu
ZW
D000328:Adult; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D020878:Device Removal / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices; D011446:Prospective Studies; D012189:Retrospective Studies