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Table 1 Summary of demographic and sleep characteristics for the overall sample and by allergic disease status

From: Sleep and allergic diseases among young Chinese adults from the Singapore/Malaysia Cross-Sectional Genetic Epidemiology Study (SMCGES) cohort

Variable

Overall

N = 15581

Atopic dermatitis

Allergic rhinitis

Ever asthma

No

N = 11491

Yes

N = 3931

p-value2

No

N = 9871

Yes

N = 5641

p-value2

No

N = 13201

Yes

N = 2271

p-value2

Age at collection (in years)

25.0 ± 7.6

25.0 ± 7.9

24.9 ± 6.6

0.769

25.5 ± 8.4

24.0 ± 5.7

 < 0.001

24.9 ± 7.6

25.1 ± 7.5

0.697

Gender

   

0.023

  

0.004

  

0.006

    Female

955 (61.4%)

726 (63.2%)

221 (56.5%)

 

632 (64.1%)

318 (56.5%)

 

827 (62.7%)

120 (52.9%)

 

    Male

601 (38.6%)

423 (36.8%)

170 (43.5%)

 

354 (35.9%)

245 (43.5%)

 

491 (37.3%)

107 (47.1%)

 

    Unknown

2

0

2

 

1

1

 

2

0

 

Housing type

   

0.010

  

0.009

  

0.333

    Flats

980 (65.4%)

709 (64.4%)

259 (67.8%)

 

606 (64.3%)

369 (67.2%)

 

823 (65.1%)

152 (68.5%)

 

    Condo/private apartment

408 (27.2%)

321 (29.2%)

86 (22.5%)

 

278 (29.5%)

129 (23.5%)

 

346 (27.4%)

59 (26.6%)

 

    Landed property

110 (7.3%)

71 (6.4%)

37 (9.7%)

 

59 (6.3%)

51 (9.3%)

 

96 (7.6%)

11 (5.0%)

 

    Unknown

60

48

11

 

44

15

 

55

5

 

Income category

   

0.010

  

0.005

  

0.051

    < SGD 2000

159 (10.4%)

129 (11.4%)

29 (7.5%)

 

118 (12.2%)

41 (7.4%)

 

136 (10.5%)

21 (9.5%)

 

    SGD 2000—3999

418 (27.4%)

315 (28.0%)

96 (24.9%)

 

276 (28.6%)

141 (25.4%)

 

365 (28.1%)

49 (22.3%)

 

    SGD 4000—5999

338 (22.1%)

256 (22.7%)

80 (20.8%)

 

206 (21.3%)

131 (23.6%)

 

292 (22.5%)

43 (19.5%)

 

    ≥ SGD 6000

612 (40.1%)

427 (37.9%)

180 (46.8%)

 

366 (37.9%)

242 (43.6%)

 

504 (38.9%)

107 (48.6%)

 

    Unknown

31

22

8

 

21

9

 

23

7

 

Total sleep time (in hours)

6.8 ± 1.1

6.8 ± 1.0

6.8 ± 1.1

0.480

6.9 ± 1.0

6.7 ± 1.1

0.053

6.8 ± 1.1

6.7 ± 1.0

0.015

Sleep quality

   

0.170

  

0.933

  

0.324

    Very bad to moderate

453 (44.6%)

328 (43.2%)

118 (48.2%)

 

303 (44.7%)

147 (44.4%)

 

390 (44.1%)

61 (48.8%)

 

    Good to very good

562 (55.4%)

432 (56.8%)

127 (51.8%)

 

375 (55.3%)

184 (55.6%)

 

494 (55.9%)

64 (51.2%)

 

    Unknown

543

389

148

 

309

233

 

436

102

 
  1. 1Mean ± SD; n (%). 2Welch’s two-sample t-test was conducted for age and total sleep time. Pearson’s chi-squared test was conducted for housing type and income category