Table 1

Demographic information of the subjects
n (female/male) Mean age (SD) p- value*
Subjects in all five cities
Total 16074 (8388/7686) 42.6 (15.2)
SRH
very good 1770 (845/925) 34.7 (12.7) <0.001
good 7581 (3773/3808) 40.1 (14.3)
fair 5803 (3233/2570) 46.0 (15.0)
bad 862 (506/356) 55.0 (14.6)
very bad 58 (31/27) 53.8 (16.2)
Subjects in Shanghai who have completed the blood sampling
Total 3151 (1749/1402) 47.7 (14.1)
SRH
very good 164 (74/90) 41.5 (13.6) <0.001
good 1347 (694/653) 44.6 (14.0)
fair 1492 (890/602) 50.3 (13.2)
bad 141 (88/53) 58.0 (13.0)
very bad 7 (3/4) 47.6 (16.5)

* p-values for mean ages.

Wu et al.

Wu et al. BMC Public Health 2013 13:320   doi:10.1186/1471-2458-13-320

Open Data