Table 6.

Daily protein intake (g), by age, sex, geographical region, income, and urbanicity, in Chinese rural adults from 1991 to 2011.

General Characteristics	Survey Year 1								ptrend 2
	1991	1993	1997	2000	2004	2006	2009	2011
All	75.3 ± 1.5	74.7 ± 1.5	73.9 ± 1.5	71.4 ± 1.5	70.2 ± 1.5	69.6 ± 1.5	69.3 ± 1.5	64.4 ± 1.5	p < 0.0001
Age (year)
18–39	76.9 ± 1.4	75.9 ± 1.4	74.8 ± 1.4	70.6 ± 1.4	69.3 ± 1.4	68.9 ± 1.4	68.7 ± 1.4	65.0 ± 1.5	p < 0.0001
40–60	73.3 ± 1.9	73.4 ± 1.9	73.1 ± 1.9	72.7 ± 1.9	71.0 ± 1.9	70.8 ± 1.9	70.0 ± 1.9	64.1 ± 1.9	p < 0.0001
Sex
Male	80.6 ± 1.8	79.7 ± 1.8	79.3 ± 1.8	78.0 ± 1.8	76.3 ± 1.8	75.5 ± 1.8	75.2 ± 1.8	71.3 ± 1.8	p < 0.0001
Female	71.0 ± 1.4	70.4 ± 1.4	67.5 ± 1.4	65.0 ± 1.4	64.4 ± 1.3	64.3 ± 1.2	63.5 ± 1.4	58.1 ± 1.4	p < 0.0001
Region
North	78.1 ± 2.5	77.5 ± 2.5	72.6 ± 2.5	71.4 ± 2.5	66.9 ± 2.5	66.4 ± 2.4	64.9 ± 2.5	63.5 ± 2.5	p < 0.0001
Central	75.7 ± 3.7	74.9 ± 3.7	75.5 ± 3.7	73.5 ± 3.7	72.5 ± 3.7	71.8 ± 3.7	70.7 ± 3.7	69.8 ± 3.7	p < 0.0001
South	72.8 ± 2.4	72.4 ± 2.4	72.5 ± 2.4	71.5 ± 2.4	70.7 ± 2.4	68.0 ± 2.4	66.7 ± 2.4	61.6 ± 2.4	p < 0.0001
Income
Low	74.2 ± 2.1	72.7 ± 2.1	72.1 ± 2.1	70.3 ± 2.1	68.7 ± 2.1	68.4 ± 2.1	67.1 ± 2.1	62.3 ± 2.1	p < 0.0001
Medium	75.8 ± 1.4	74.6 ± 1.4	74.0 ± 1.4	71.6 ± 1.4	69.8 ± 1.4	69.6 ± 1.4	69.0 ± 1.4	66.2 ± 1.4	p < 0.0001
High	76.3 ± 1.5	76.2 ± 1.5	73.4 ± 1.5	72.4 ± 1.5	72.3 ± 1.5	71.0 ± 1.5	71.9 ± 1.5	66.8 ± 1.5	p < 0.0001
Urbanicity
Low	74.7 ± 2.3	74.0 ± 2.3	71.1 ± 2.3	70.8 ± 2.3	68.6 ± 2.3	68.6 ± 2.3	66.5 ± 2.3	65.2 ± 2.3	p < 0.0001
Medium	73.7 ± 1.6	73.3 ± 1.6	72.5 ± 1.6	71.2 ± 1.6	71.5 ± 1.6	69.7 ± 1.6	70.1 ± 1.6	61.9 ± 1.6	p < 0.0001
High	77.6 ± 1.5	77.0 ± 1.5	75.3 ± 1.5	73.0 ± 1.5	72.3 ± 1.5	71.2 ± 1.5	71.4 ± 1.5	66.7 ± 1.5	p < 0.0001

¹ Mean ± SE (all such values). ² Values adjusted for age, sex, region, income, and urbanicity.