Table 5. Subjects according to decade falling below the confidence intervals^a .

Age, y	95% confidence interval	Cases below confidence interval (%)
40–49	28.3–29.5	9 (70)
50–59	27.9–29.0	14 (67)
60–69	26.5–27.7	14 (78)
70–79	23.9–26.0	1 (33)

^aBased on normative data for the Functional Gait Assessment as described by Walker et al.¹⁵