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Table 2 Cluster scores’ distribution and paired analyses between Time 1 and Time 2 (n = 85)

From: The evolution of symptoms of nervous system dysfunction in a First Nation community with a history of mercury exposure: a longitudinal study

 

Time 1

Time 2

  
 

Median

IQR

Median

IQR

Wilcoxon Signed Rank (S)

p

Cluster 1

(Extrapyramidal impairment)

5.06

(3.39 – 7.26)

6.22

(4.58 – 8.23)

814

 < 0.0001

Cluster 2

(Sensory impairment)

5.21

(2.94 – 6.58)

6.24

(4.51 – 7.44)

871

 < 0.0001

Cluster 3

(Cranial nerve disturbances)

5.05

(3.60 – 6.30)

5.60

(4.11 – 6.58)

607

0.0036

Cluster 4

(Gross motor impairment)

4.57

(3.55 – 6.36)

6.65

(4.57 – 8.50)

1238

 < 0.0001

Cluster 5

(Neuro-cognitive deficits)

4.80

(3.51 – 6.00)

6.86

(5.48 – 8.01)

1551

 < 0.0001

Cluster 6

(Affect/Mood disorders)

5.04

(3.00 – 6.45)

6.55

(5.20 – 7.74)

1212

 < 0.0001

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Environmental Health

ISSN: 1476-069X