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Table 4 Changes between baseline and follow-up among the participants in the clinical examination, in neck/shoulder pain, diagnosed disorders and work ability. Data is shown for the Intervention groupa and the Reference group, stratified by neck/shoulder pain at baseline (no/yes)

From: Opting to wear prismatic spectacles was associated with reduced neck pain in dental personnel: a longitudinal cohort study

 

Neck/shoulder pain at baseline

No

Yes

Intervention group

Reference group

p-valueb

Intervention group

Reference group

p-valueb

Clinical examination (HECO)

n = 85

n = 52

 

n = 102

n = 36

 

Musculoskeletal painc

 Worse

15 (18)

13 (25)

    

 Unchanged

68 (82)

39 (75)

0.386

67 (68)

27 (75)

 

 Better

   

32 (32)

9 (25)

0.527

One or more diagnoses

 Worse

7 (8)

3 (6)

 

7 (7)

6 (17)

 

 Unchanged

78 (92)

49 (94)

0.742

74 (73)

29 (81)

 

 Better

   

21 (21)

1 (3)

0.006

Work abilityd

 Worse

16 (22)

8 (20)

 

23 (25)

15 (42)

 

 Unchanged

38 (51)

22 (55)

 

32 (34)

17 (47)

 

 Better

20 (27)

10 (25)

1.000

38 (41)

4 (11)

0.003

  1. a45 participants who were given prismatic glasses but reported that they did not use them on a regular basis were excluded
  2. bLinear-by-Linear Association
  3. cFive subjects missing in the intervention group; whereof two without pain and three with pain at baseline
  4. dTwenty subjects missing in the Intervention group (11 without pain and 9 with pain at baseline). Twelve subjects from the Reference group missing, all without pain
  5. Values presented are number (%)