Table 2

Social, health and physical inactivity correlates of CFS (univariate)a

CFS correlate

Percentage (n/N), unweighted

OR (95% CI), weighted


Social support

Confiding/emotional support

Low

3.1 (35/1,132)

1

Average

2.3 (38/1,675)

0.7 (0.4 to 1.3)

High

2.4 (33/1,398)

0.8 (0.5 to 1.5)

Practical support

Low

1.9 (16/861)

1

Average

2.1 (28/1,317)

0.99 (0.5 to 2)

High

3.1 (62/2,032)

1.4 (0.7 to 2.7)

Negative aspects of support

Low

0.6 (4/631)

1

Average

2 (30/1,472)

2.3 (0.7 to 7.6)

High

3.4 (72/2,103)

4 (1.2 to 12.4)b

Chronic strains

Tertiles of total score

Low

0.9 (9/1,023)

1

Average

2.2 (46/2,124)

2.3 (1.04 to 5)b

High

4.8 (53/1,100)

4.9 (2.2 to 10.6)c

Perceived discrimination

Total score (means)

-

1.5 (1.1 to 2)d

Mental health (CIS-R subscales)

Depression score

-

2.2 (1.9 to 2.6)c

Anxiety score

-

2.2 (1.9 to 2.6)c

Physical inactivity

Days of moderate activity of ≥30 minutes/day in past 4 weeksb

5 or more (high)

1.4 (16/1,126)

1

1 to 4 (medium)

1.3 (16/1,256)

1.02 (0.4 to 2.3)

1 or <1 (low)

4 (75/1,883)

3.3 (1.7 to 6.2)

Activity intensity

Moderate/vigorous

1.7 (55/3,217)

1

Inactive/light

5.7 (53/926)

4.6 (2.9 to 7.2)


aCFS, chronic fatigue syndrome; OR, odds ratio; 95% CI, 95% confidence interval; CIS-R, Revised Clinical Interview Schedule; bP ≤ 0.05; cP ≤ 0.001; dP ≤ 0.01.

Bhui et al. BMC Medicine 2011 9:26   doi:10.1186/1741-7015-9-26

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