Table 3 Sequential changes in the relationship between TUG and MMSE sub-items.

From: Association of gait and cognition after surgery in patients with idiopathic normal pressure hydrocephalus

 

Pre

3M

6M

12M

N

 

48

47

48

Ordinal

Edf (dev.expl), p

Edf (dev.expl), p

Edf (dev.expl), p

Edf (dev.expl), p

Time

1.88 (7.86%), 0.34

1.30 (7.76%), 0.14

1.20 (3.82%), 0.34

1 (20.1%), < 0.01*

Place

1 (2.89%), 0.24

2.31 (16.8%), 0.07

1.65 (5.52%), 0.38

1 (12.5%), 0.01*

Regist

1 (0.27%), 0.72

1.91 (33.3%), < 0.001*

1.76 (21.8%), < 0.01*

1.84 (21.8%), < 0.01*

Serial

1 (1.06%), 0.48

1.96 (11%), 0.18

1 (16.1%), < 0.01*

1.57 (18.3%), < 0.01*

3-step

1 (1.41%), 0.41

1.88 (32.8%), < 0.001*

1.86 (21.6%), < 0.01*

1.91 (24.9%), < 0.01*

Recall

2.1 (17.5%), 0.15

1.00 (5.57%), 0.11

1 (3.73%), 0.19

1 (8%), 0.051

Binary

Est (SE), p

Est (SE), p

Est (SE), p

Est (SE), p

Repeat

0.56 (12.73), 0.96

− 2.75 (2.06), 0.19

− 1.52 (3.01), 0.62

1.47 (2.06), 0.48

Read

− 3.62 (15.66), 0.82

12.84 (3.18), < 0.001*

− 15.08 (5.15), < 0.01*

− 13.63 (3.87), < 0.001*

Write

− 15.05 (12.20), 0.22

− 3.17 (1.64), 0.06

− 4.21 (2.60), 0.11

− 6.67 (2.00), < 0.01*

Copy

− 5.51 (11.63), 0.64

− 4.10 (1.56), 0.01*

− 5.60 (2.54), 0.03*

− 4.04 (1.99), 0.048*

  1. The number of statistically significant sub-items (with *) increased during the follow-up period (3M, 6M, 12M: 3, 6, and 12 months after surgery). The effective degrees of freedom (Edf) show that 1 is equivalent to linearity and edf > 2 is highly non-linear. Est estimate, dev.expl deviance explained, p probability, SE standard error, TUG Timed Up and Go test, MMSE Mini-Mental State Examination.
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