Table 4 Covariance analysis results of SF-36 (mean ± SD).

From: Association of p-phenylenediamine exposure with alterations of pulmonary function, pruritus and health-related quality of life in hair dye factory workers: a cross-sectional study

Variable

PF

RP

BP

GH

VT

SF

RE

MH

HT

Total score

Lower exposure (n = 24)

98.13 ± 2.88

96.09 ± 6.60

97.25 ± 8.77

92.0 ± 10.62

72.08 ± 9.55

92.71 ± 9.69

93.06 ± 9.08

61.5 ± 5.25

85.40 ± 24.36

788.32 ± 48.52

Middle exposure (n = 50)

97.40 ± 3.81

94.88 ± 9.25#

83.60 ± 21.01*#

78.4 ± 13.93*#

65.30 ± 14.16

91.20 ± 12.94

95.83 ± 8.29

59.04 ± 6.18#

59.50 ± 19.49*#

725.29 ± 47.11*#

Higher exposure (n = 50)

98.50 ± 2.31

96.87 ± 5.54

97.37 ± 5.23

88.20 ± 16.96

62.30 ± 11.91*

87.25 ± 15.04

94.3 ± 10.84

55.12 ± 8.68*

72.50 ± 22.73

752.45.32 ± 47.52*

F

1.276

2.444

8.972

6.983

5.51

1.632

0.617

4.477

6.163

3.780

P

0.268

0.023

 < 0.001

 < 0.001

 < 0.001

0.133

0.741

 < 0.001

 < 0.001

0.026

  1. The covariant variables including gender, ethnic group, working age, education condition and recent hair dye history.
  2. SF-36: the short form 36 health survey; PF: physical functioning; RP: role-physical; BP: body pain; GH: general health; VT: vitality; SF: social functioning; RE: role-emotional; MH: mental health; HT: health transition.
  3. *P < 0.05, comparison of the higher and middle exposure group with the lower exposure group by Bonferroni method.
  4. #P < 0.05, comparison between the higher exposure group and middle exposure group by Bonferroni method.
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