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Table 1 Descriptive data for the analysis variables

From: Social class and gender patterning of insomnia symptoms and psychiatric distress: a 20-year prospective cohort study

Sample characteristics (n = 999)

N (%)

Gender

Male

457 (45.7)

 

Female

542 (54.3)

Social class at age 36

Non-manual

686 (68.7)

 

Manual

304 (30.4)

 

Missing

9 (0.9)

GHQ (2+) at age 36

No

593 (59.4)

 

Yes

303 (30.3)

 

Missing

103 (10.3)

GHQ (2+) at age 57

No

706 (70.7)

 

Yes

255 (25.5)

 

Missing

38 (3.8)

Most likely sleep class

Healthy

464 (46.4)

 

Episodic maintenance

164 (16.4)

 

Developing

250 (25.0)

 

Chronic Mixed

112 (11.2)

 

Missing

9 (0.9)

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BMC Psychiatry

ISSN: 1471-244X

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