Trends of central obesity and associations with nutrients intake and daily behaviors among women of childbearing age in China.

At the same time, sleep duration showed a significant downward trend, from (8.3 ± 1.1) hours in 2004 to (8.0 ± 1.0) hours in 2011, while sedentary time showed an increasing trend, from (2.8 ± 2.0) hours to (3.3 ± 2.2) hours (both p < 0.001).

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