Table 3. Extent of inequalities in intrinsic capacity, China, 2011–2013 .

Capacity	Modified concentration index (95% CI)
Intrinsic	0.024 (0.021 to 0.027)
Locomotion	0.002 (−0.002 to 0.006)
Cognitive	0.043 (0.036 to 0.050)
Vitality	0.012 (0.011 to 0.013)
Sensory	0.032 (0.025 to 0.039)
Psychological	0.005 (−0.006 to 0.016)

CI: confidence interval.

Notes: We included 21 783 participants from the CHARLS study, waves 1 and 2. The concentration index ranges from −1 to 1, with positive values indicating that people with a higher intrinsic capacity are more concentrated among high-income groups and negative values indicating that people with a higher intrinsic capacity are more concentrated among low-income groups.