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Table 1 Characteristics of the sample, absolute numbers and proportions in per cent, N (%)

From: Insomnia and urban neighbourhood contexts – are associations modified by individual social characteristics and change of residence? Results from a population-based study using residential histories

 

Whole Sample

Insomniacs

Non-insomniacs

p (Chi2)

 

N = 2873

N = 342 (11.9%)

N = 2531 (88.1%)

 

Individual characteristics

    

Female

1426 (49.6%)

229 (67.0%)

1197 (47.3%)

0.000

Mean age (SD)

59.97 (SD 7.7)

60.32 (SD 7.5)

59.92 (SD 7.8)

 

Economic activity

    

Employed

1157 (40.3%)

113 (33.0%)

1044 (41.2%)

0.000

Economically inactive

379 (13.2%)

68 (19.9%)

311 (12.3%)

 

Retired

1168 (40.7%)

133 (38.9%)

1035 (40.9%)

 

Unemployed

169 (5.9%)

28 (8.2%)

141 (5.6%)

 

Education

    

≥ 18 yrs.

297 (10.3%)

18 (5.3%)

279 (11.0%)

0.000

14-17 yrs.

666 (23.2%)

46 (13.5%)

620 (24.5%)

 

11-13 yrs.

1576 (54.9%)

198 (57.9%)

1378 (54.4%)

 

≤ 10 yrs.

334 (11.6%)

80 (23.4%)

254 (10.0%)

 

Income

    

Lowest (first quartile)

735 (25.6%)

111 (32.5%)

624 (24.7%)

0.002

Social isolation

    

Social Integration Index Level I

215 (7.5%)

47 (13.7%)

168 (6.6%)

0.000

Change of residence

    

Never

2317 (80.6%)

275 (80.4%)

2042 (80.7%)

0.905

Ever

556 (19.4%)

67 (19.6%)

489 (19.3%)

 

Neighbourhood contextual characteristics

    

Mean unemployment rate

    

Lowest (first quartile)

682 (23.7%)

60 (17.5%)

622 (24.6%)

0.004

Mid-low (second quartile)

738 (25.7%)

79 (23.1%)

659 (26.0%)

 

Mid-high (third quartile)

779 (27.1%)

106 (31.0%)

673 (26.6%)

 

Highest (forth quartile)

674 (23.5%)

97 (28.4%)

577 (22.8%)

 

High residential turnover

    

Never

2218 (77.2%)

251 (73.4%)

1967 (77.7%)

0.104

At some time

544 (18.9%)

72 (21.1%)

472 (18.6%)

 

All the time

111 (3.9%)

19 (5.6%)

92 (3.6%)

 

Mean years having lived under high noise at night time (SD)

0.49 (SD 2.05)

0.62 (SD 2.30)

0.47 (2.01)

0.184*

  1. * t-test.