Skip to main content

Table 1 Baseline characteristics of the subjects given prismatic glasses and the reference group. Values presented are number (%) or median (min-max)

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

 

Intervention group

Reference group

p-valuea

N = 371

N = 193

 

Women, n (%)

292 (79)

151 (78)

0.914

Age (years), n (%)

50 (23–66)

51 (23–73)

0.078

Profession, median (range)

   

 Dentists

243 (65)

112 (58)

 

 Hygienists

105 (28)

68 (35)

 

 Orthodontic assistants

23 (6)

13 (7)

0.195

Questionnaire

n = 236

n = 130

 

Dental work (hours/week), n (%)

   

 0–29

75 (32)

49 (38)

 

 30–40

161 (68)

81 (62)

0.299

Perceived exertionb n (%)

   

 0–7

124 (53)

72 (58)

 

 >7

110 (47)

53 (42)

0.437

Complaints frequencyc n (%)

   

 2 times a month or less

83 (35)

58 (45)

 

 Once a week or more

153 (65)

70 (55)

0.071

Clinical examination (HECO)

n = 232

n = 89

 

Diagnoses in neck/shoulders, n (%)

39 (17)

6 (7)

0.020

Neck/shoulder paind n (%)

129 (56)

36 (41)

0.024

Work abilitye median (range)

9 (3–10)

9 (4–10)

0.588

  1. aFisher’s exact test or the Mann–Whitney U test
  2. b2 subjects missing in the intervention group and 5 subjects missing in the reference group
  3. c2 subjects missing in the reference group
  4. d1 subject missing in the reference group
  5. e22 subjects missing in the intervention group and 11 missing in the reference group