Skip to main content

Table 5 Association between daily sun exposure time (minutes) and parameters of disease activity or disability (percent of patients or mean ± SD)

From: Vitamin D deficiency in rheumatoid arthritis: prevalence, determinants and associations with disease activity and disability

Sun exposure time (minutes)

<10

10 to 20

20 to 30

>30

P= Chi-square or ANOVA

Disease Remission = No

85.8%

70.3%

76.3%

73.7%

0.007

Treatment Response = Fair or No

61.1%

54.6%

50.6%

52.9%

0.05

Steinbrocker Functional state > 1

69.6%

66.5%

59.0%

57.4%

0.001

Swollen joints count

4.3 ± 6.3

3.2 ± 4.9

2.4 ± 4.0

2.1 ± 3.3

<0.001

DAS28 >3.1

83.1%

73.7%

70.9%

65.5%

<0.001

HAQ score

1.4 ± 0.9

1.2 ± 0.9

1.0 ± 0.8

0.9 ± 0.7

<0.001

  1. Abbreviations: DAS 28, Disease Activity Score 28; HAQ, Health Assessment Questionnaire Disability Index.