Erratum to: Self-perceived uselessness and associated factors among older adults in China

Erratum

After the publication of this work [1] five corrections were discovered in the text. The corrections are as follows:

• 1. In the first line of the fourth paragraph in the section, Background, the text “non-Western cultures” should be “Western cultures”.

• 2. In the first line of the section, Factors associated with self-perceived uselessness, the text “six sets” should be “five sets”.

• 3. In Row 2 of Table 1, the text “Giving money/food to children-yes” should be “Giving money/food to children-no”. But the figures in the same line should stay. The “no” category should be corresponding to 77.0.

• 4. In Row 3 of Table 1, the text “Giving money/food to children-no” should be “Giving money/food to children-yes”. The figures in the same line should stay. The “yes” category should be corresponding to 23.0.

• 5. The last sentence of the first paragraph in section, Risk of self-perceived uselessness was lower in supportive and culturally traditional social environments, “The findings in Model III in Table 3 are similar to those in Table 2 except that some of these variables were still significant in Table 3” should be “The findings in Model III in Table 3 indicate that the association between social environments and self-perceived uselessness was weakened when the moderate frequency of self-perceived uselessness was compared to the low frequency”.