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Table 4 Descriptive statistical analysis and comparison of variables in 2005 and 2008

From: Medical insurance policy organized by Chinese government and the health inequity of the elderly: longitudinal comparison based on effect of New Cooperative Medical Scheme on health of rural elderly in 22 provinces and cities

   B11 B12 B121 B23 B24 B26 D11b G9 G11
Mean value 2005 2.40 2.60 3.35 3.99 3.87 2.44 2.93 1.42 1.47
2008 2.40 2.58 3.32 3.97 3.87 3.11 3.03 1.46 1.50
Plural 2005 2 2 3 4 5 1 1 1 1
2008 2 2 3 5 5 3 5 1 1
Minimum 2005 1 1 1 1 1 1 1 1 1
2008 1 1 1 1 1 1 1 1 1
Maximum 2005 5 5 5 5 5 5 5 3 3
2008 5 5 5 5 5 5 5 3 3
Skewness 2005 0.404 0.260 −0.136 −0.614 −0.666 0.364 0.096 1.253 1.160
2008 0.370 0.204 −0.126 −0.714 −0.608 0.037 -0.076 1.136 1.056
Standard error of skewness 2005 0.027 0.027 0.028 0.028 0.028 0.028 0.026 0.026 0.026
2008 0.026 0.026 0.027 0.027 0.027 0.027 0.025 0.025 0.025
Kurtosis 2005 0.211 −0.405 0.433 −0.100 −0.107 −0.900 −1.804 0.360 0.001
2008 0.200 −0.491 0.456 −0.067 −0.364 −0.792 −1.842 0.082 0.082
Standard error of kurtosis 2005 0.055 0.055 0.055 0.056 0.056 0.056 0.053 0.053 0.053
2008 0.053 0.053 0.053 0.054 0.054 0.054 0.049 0.049 −0.249
  1. Note: b11: Self-rated quality of life;b12: Self-rated health; b121: do you feel any change of your health since last year; b23: Feel fearful or anxious; b24: Feel lonely and isolated; b26: Feel useless with age; d11b: Do you do any outdoor activities at present?; g9: Able to stand up from sitting in a chair?; g11: Able to pick up a book from the floor?