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Table 9 Odds ratios and confidence intervals for neurologic and behavioral disorders comparing exposed and unexposed residents

From: Cluster of systemic lupus erythematosus (SLE) associated with an oil field waste site: a cross sectional study

 

Exposed N(%) or mean ± s.d.

Unexposed N(%) or mean ± s.d.

Odds Ratio

95% Confidence Interval

P-value

Dizziness*

4.40 ± 3.10

2.25 ± 1.96

4.42

2.37, 8.24

<0.0001

Lightheadedness*

4.85 ± 3.12

2.65 ± 1.81

5.02

2.69, 9.34

<0.0001

Loss of balance*

3.68 ± 3.07

2.24 ± 1.73

2.83

1.53, 5.22

0.0009

Extreme fatigue*

6.97 ± 3.69

3.12 ± 2.40

11.50

5.94, 22.28

<0.0001

Somnolence*

5.08 ± 3.76

2.11 ± 1.86

4.99

2.66, 9.36

<0.0001

Can't fall asleep*

4.79 ± 3.79

2.89 ± 2.50

1.94

1.06, 3.54

0.03

Wake up frequently*

5.12 ± 3.79

2.91 ± 2.55

3.98

2.16, 7.36

>0.0001

Sleep soundly for only a few hours*

4.83 ± 3.59

2.81 ± 2.51

4.00

2.16, 7.40

>0.0001

Lack of concentration*

5.70 ± 3.73

3.76 ± 2.66

2.67

1.47, 4.84

0.001

Recent memory loss*

5.22 ± 3.82

3.76 ± 2.66

2.87

1.58, 5.23

0.0006

Decreased libido*

4.36 ± 4.00

2.92 ± 2.35

3.00

1.60, 5.59

0.0006

When driving in familiar areas, do you ever get lost or go the wrong way *

2.67 ± 2.73

1.55 ± 1.33

3.05

1.54, 6.08

0.002

  1. * Odds ratio and confidence intervals are estimated using multinomial logistic regression models with generalized estimating equations (GEE); odds ratio interpreted as the odds of exposed being in a higher category compared to unexposed. Respondents were asked to "score each question on a scale of 1 – 11, one representing never and 11 representing always.
  2. Controlled for age, gender, race/ethnicity, education and smoking history