Table 5. Comparison of mean intake and its standard deviation of total energy, protein and fat in Nanjing between 7-day and 3-day records, and between 3-day records for 1995 and 2000.

	7-day record	3-day record		p-value*	p-value**
	1995	1995	2000
	n=198	n=198	n=50
Energy (kcal)	2094 ± 467	2099 ± 456	2138 ± 189	0.916	0.615
Protein (g)	78.0 ± 24.1	77.3 ± 23.2	84.4 ± 24.8	0.793	0.056
Fat (g)	63.0 ± 22.1	61.9 ± 25.2	67.0 ± 31.3	0.626	0.278
Carbohydrates (g)	298.7 ± 81.6	305.0 ± 79.5	298.6 ± 78.2	0.440	0.607

*Between 7-day and 3-day records for 1995.

**Between 3-day records for 1995 and 2000.