Social disparities in body mass index (BMI) trajectories among Chinese adults in 1991–2011

Table 2 The changes of BMI over time vary with education for selected age groups

Male	Edu**	1991	1993	1997	2000	2004	2006	2009	2011	Δ(%)*
1946–1950	1	22.64	22.52	23.39	23.65	23.43	23.52	24.78	23.98	5.92
	0	21.68	21.91	22.17	22.59	22.64	22.57	22.88	23.09	6.51
1951–1955	1	22.34	22.66	23.73	24.25	24.01	23.99	24.05	23.68	6.04
	0	21.64	21.89	22.19	22.31	22.61	22.63	23.06	23.38	8.01
1956–1960	1	21.92	22.18	22.66	23.22	23.75	24.14	23.74	23.61	7.73
	0	21.48	21.61	22.06	22.7	22.92	23	23.64	23.91	11.28
1961–1965	1	21.36	21.66	22.72	23.5	23.25	23.35	24.54	24.52	14.82
	0	21.27	21.54	21.81	22.48	23	23.23	23.67	24.04	13.03
1966–1973	1	21.05	21.86	22.27	23.09	23.19	23.24	24.01	24.80	17.82
	0	20.48	20.82	21.32	21.79	22.38	22.48	22.98	23.19	13.22
Female	Edu	1991	1993	1997	2000	2004	2006	2009	2011	Δ(%)
1946–1950	1	24.05	24.73	24.39	23.79	24.81	24.94	25.13	24.52	1.95
	0	22.59	22.84	23.05	23.38	23.59	23.46	23.52	23.60	4.47
1951–1955	1	21.57	21.60	22.31	22.82	22.72	22.85	22.24	22.08	2.36
	0	22.11	22.30	22.70	23.20	23.44	23.65	23.82	23.88	8.01
1956–1960	1	21.43	21.59	22.45	22.80	22.50	23.00	23.34	23.71	10.64
	0	22.11	22.37	22.92	23.70	23.90	24.30	24.56	24.66	11.53
1961–1965	1	20.90	21.22	21.90	22.87	22.13	22.15	22.72	24.10	15.31
	0	21.37	21.74	22.29	22.97	23.44	23.58	24.22	24.75	15.82
1966–1973	1	20.21	20.19	21.74	21.93	23.29	23.18	22.08	22.13	9.50
	0	21.08	21.16	21.79	22.24	22.95	22.92	23.02	23.61	12.00

Note:
\( \Delta ={\frac{BMI_{2011}-{BMI}_{1991}}{BMI_{1991}}}^{\ast }100\% \).
* 1 to 2011 BMI growth rate
** Edu = 1 means more than 9 years of formal education, and Edu = 0 means 9 or less than 9 years of formal education

ISSN: 1475-9276