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Table 4 Relationship between demographic, occupational characteristics, and laboratory parameters with global PSQI and restless legs syndrome scores in the workers under study

From: The relationship between iron deficiency anemia with restless leg syndrome and sleep quality in workers working in a textile factory in Iran: a cross-sectional study

Quantitative variables

Global PSQI score

Restless legs syndrome score

r*

Pvalue

r

Pvalue

 Age (year)

−0.200

0.003

−0.164

0.016

 Work experience (year)

−0.160

0.019

−0.108

0.115

 Number of shifts per week

−0.033

0.627

0.062

0.365

 Number of hours of work shift

−0.022

0.752

−0.071

0.300

 Hemoglobin (gr/dl)

−0.149

0.029

−0.548

<0.001

 MCV (μm3)

0.062

0.364

−0.110

0.107

 Ferritin (ng/ml)

−0.186

0.006

−0.410

<0.001

 TIBC (μg/d)

0.227

<0.001

0.395

<0.001

Qualitative variables

Variable

Mean

S.D

**Pvalue

 Global PSQI score

Male

8.46

1.97

0.024

Female

9.63

2.35

 Restless legs syndrome score

Male

10.60

2.93

<0.001

Female

16.5

1.64

 Global PSQI score

Non-academic

8.11

1.36

0.146

Academic

7.96

1.89

 Restless legs syndrome score

Non-academic

16.83

2.24

0.339

Academic

16.64

1.89

  1. **Independent sample t test. r*Pearson correlation coefficient