Numbers (%) of concordant and discordant twin pairs in different disability pension (DP) diagnostic groups, by sex and zygosity.

Note. C+ concordant for DP diagnosis, C− concordant for no DP, D discordant;awoman on DP,bman on DP.备注：C+与DP诊断结果一致，C−与未发生DP的结果一致，D与结果不一致；a为罹患DP的女性，b为罹患DP的男性。