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Table 2 The absolute and normalized maximal reach distance at test and retest in the three test directions (anterior, posteromedial, and posterolateral) and the composite score

From: Investigation of inter-rater and test-retest reliability of Y balance test in college students with flexible flatfoot

Direction

Absolute Maximal Reach Distance(cm)Mean ± SD [95%CI]

Normalized Maximal Reach

Distance (%) Mean ± SD[95%CI]

Rater A

  

 AT

58.65 ± 5.16[56.72,60.58]

69.11 ± 6.25[66.77,71.44]

 PM

97.6 ± 9.99[93.87,101.33]

114.74 ± 9.15[111.33,118.16]

 PL

94.32 ± 8.83[91.02,97.61]

110.97 ± 8.83[107.67,114.26]

 CS

250.57 ± 20.16[243.04,258.09]

98.27 ± 6.37[95.89,100.64]

Rater B

  

 AT

57.80 ± 5.55[55.73,59.87]

68.14 ± 7.10[65.49,70.49]

 PM

96.8 ± 8.70[93.55,100.05]

113.85 ± 7.95[110.88,116.82]

 PL

94.08 ± 8.20[91.02,97.14]

110.73 ± 8.38[107.60,113.86]

 CS

248.68 ± 17.94[241.99,255.38]

97.57 ± 5.95[95.35,99.79]

Retest

  

 AT

58.15 ± 5.17[56.22,60.08]

68.54 ± 6.43[66.14,70.94]

 PM

97.07 ± 9.89[93.37,100.76]

114.16 ± 9.71[110.54,117.79]

 PL

93.32 ± 8.65[90.09,96.55]

109.83 ± 9.03[106.45,113.20]

 CS

248.53 ± 18.62[241.58,255.49]

97.51 ± 6.20[95.19,99.82]

  1. Values are presented with mean ± standard deviation (SD) and 95% confidence intervals [95% CI]
  2. Normalized reach distance was calculated as (absolute reach distance/leg length) *100%
  3. AT = anterior; PM = posteromedial; PL = posterolateral CS = composite score