Breast cancer stage at diagnosis and area-based socioeconomic status: a multicenter 10-year retrospective clinical epidemiological study in China

Table 1 SEIs of seven regions

Variable by level	Total (Range)	Beijing (North)	Liaoning (Northeast)	Hunan (Central)	Guangdong (South)	Zhejiang (East)	Shannxi (Northwest)	Sichuan (Southwest)	F(P-value)	SNK* (No. of subgroups)
SEI
GDP per capita⁽¹⁾	13048 ± 5567 (8050-36146)	36146 ± 17217^a	17200 ± 6762^b	9223 ± 4019^c	21292 ± 9165^b	23832 ± 10331^b	8840 ± 4615^c	8050 ± 3599^c	12.69 (< 0.001)	3
HSE percentage⁽²⁾	4.47 ± 0.43 (3.18-6.51)	6.51 ± 0.51^a	3.18 ± 0.41^c	3.41 ± 0.74^c	4.27 ± 0.45^b	5.71 ± 0.71^a	3.87 ± 0.75^c	4.56 ± 0.66^b	38.69 (< 0.001)	3
PU/PR ratio⁽³⁾	0.80 ± 0.04 (0.54-5.39)	5.39 ± 0.22^a	1.45 ± 0.03^c	0.66 ± 0.06^d	1.67 ± 0.09^b	1.32 ± 0.04^c	0.66 ± 0.06^d	0.54 ± 0.05^d	1210 (< 0.001)	4
FPI percentage⁽⁴⁾	15.17 ± 2.98 (7.20-17.74)	7.21 ± 1.63^a	7.20 ± 1.60^a	11.31 ± 2.60^b	9.89 ± 2.57^b	17.30 ± 3.07^c	15.86 ± 4.30^c	17.74 ± 3.31^c	23.02 (< 0.001)	3

*: The single SEI values among the seven areas were compared using one-way ANOVA followed by the Student-Newman-Keuls (SNK) test, a post hoc test for significant differences among multiple groups. The areas between which there were no statistically significant differences were combined to form subgroups. a, b, c, and d represent different subgroups for each variable; if two or more regions are followed by the same letter, there is no significant difference between them.
⁽¹⁾: yuan per person per year (mean ± SD, 1999-2008)
⁽²⁾: percentage of health-services expenditure in the regional/provincial public affairs general budget (%) (mean ± SD, 1999-2008)
⁽³⁾: ratio of urban to rural population (mean ± SD, 2005-2008) (data is available in the National Bureau of Statistics of the People's Republic of China only for 2005 to 2008)
⁽⁴⁾: percentage of illiteracy among women aged 15 and over (%) (mean ± SD, 1999-2008)

ISSN: 1471-2407