a decreasing trendP < 0.0001
We observed a decreasing trend of unintended pregnancy (52.2%-30.2% among non-IDUs, 65.8%-46.0% among IDUs, both P < 0.0001).
We observed a decreasing trend of unintended pregnancy (52.2%-30.2% among non-IDUs, 65.8%-46.0% among IDUs, both P < 0.0001).