Table 1.

Characteristics of the study sample interviewed in the 1993 wave and tracked in subsequent waves of the CHNS (N=1,694)

	1993 Wave	(N=1,694)	1997 Wave	(N=1,222)	2000 Wave	(N=1,076)	2004 Wave	(N=471)	2006 Wave	(N=278)
	Mean	S.D.	Mean	S.D.	Mean	S.D.	Mean	S.D.	Mean	S.D.
Body Mass Index	15.792	2.220	16.627	2.556	17.927	2.910	19.982	3.232	20.716	3.133
Age	6.856	2.393	10.859	2.361	13.484	2.241	16.957	2.397	19.483	2.555
Male	53.8%		53.6%		54.6%		54.8%		56.8%
High-income families	18.5%		16.8%		17.4%		20.6%		22.3%
Parental years of schooling	7.198	3.098	6.967	3.051	7.262	2.997	7.103	2.998	7.214	3.032
Urban China	19.9%		16.9%		16.7%		15.9%		20.5%
Southern China	64.2%		73.7%		64.5%		65.2%		65.5%
Eastern & Middle China	70.6%		66.4%		71.7%		68.6%		65.5%