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Table 1 Baseline demographic, lifestyle, health indicators and physical functioning by diurnal SB pattern

From: Diurnal patterns of sedentary behavior and changes in physical function over time among older women: a prospective cohort study

Variable

Diurnal SB Pattern

p-value

1 (n = 2239)

2 (n = 1536)

3 (n = 1137)

4 (n = 1292)

Age (years), mean (SD)

80.6

(6.5)

78.4

(6.4)

78.1

(6.8)

76.3

(6.3)

< 0.001

Ethnicity, n (%)

        

< 0.001

 White

1316

(58.8)

752

(49)

502

(44.2)

506

(39.2)

 

 Black

699

(31.2)

478

(31.1)

459

(40.4)

449

(34.8)

 

 Hispanic

224

(10.0)

306

(19.9)

176

(15.5)

337

(26.1)

 

Education, n (%)

        

< 0.001

 HS/GED or less

434

(19.5)

337

(22.1)

199

(17.7)

281

(21.8)

 

 Some college

936

(42.1)

567

(37.2)

407

(36.2)

477

(37.0)

 

 College grad or more

853

(38.4)

622

(40.8)

519

(46.1)

531

(41.2)

 

BMI (kg/m2), mean (SD)

29.7

(6.1)

27.5

(5.3)

27.7

(5.4)

26.5

(5.1)

< 0.001

Current smoker (Yes), n (%)

73

(3.3)

37

(2.4)

32

(2.8)

20

(1.5)

0.02

Alcohol in past 3 months, n (%)

       

< 0.001

 0 drinks per week

858

(38.3)

471

(30.7)

382

(33.6)

415

(32.1)

 

  < 1 drinks per week

690

(30.8)

538

(35.0)

331

(29.1)

371

(28.7)

 

  ≥ 1 drinks per week

460

(20.5)

424

(27.6)

309

(27.2)

408

(31.6)

 

 Unknown

231

(10.3)

103

(6.7)

115

(10.1)

98

(7.6)

 

Number of morbiditiesa, n (%)

      

< 0.001

 0

298

(13.4)

293

(19.2)

197

(17.4)

295

(22.9)

 

 1

671

(30.1)

567

(37.1)

380

(33.6)

482

(37.4)

 

 2

623

(27.9)

401

(26.3)

318

(28.1)

315

(24.5)

 

  ≥ 3

637

(28.6)

266

(17.4)

237

(20.9)

196

(15.2)

 

Arthritis (Yes), n (%)

1262

(56.4)

822

(53.5)

638

(56.1)

683

(52.9)

0.11

Diabetes (Yes), n (%)

546

(24.4)

285

(18.6)

245

(21.5)

198

(15.3)

< 0.001

Stroke (Yes), n (%)

134

(6.0)

63

(4.1)

49

(4.3)

39

(3.0)

< 0.001

Self-rated general health, n (%)

      

< 0.001

 Excellent or very good

909

(40.7)

842

(55.0)

588

(51.9)

777

(60.4)

 

 Good

1017

(45.6)

576

(37.6)

441

(38.9)

424

(33.0)

 

 Fair or poor

306

(13.7)

114

(7.4)

104

(9.2)

85

(6.6)

 

Sedentary time (minutes/day), mean (SD)

668.8

(85.0)

577.5

(75.7)

592.7

(78.0)

501.2

(86.9)

< 0.001

MVPA (minutes/day), mean (SD)

28.6

(19.2)

54.2

(28.8)

50.7

(28.0)

82.1

(38.9)

< 0.001

Wear time (hours/day), mean (SD)

14.7

(1.4)

14.8

(1.3)

15.1

(1.3)

15.0

(1.3)

< 0.001

Wear days, mean (SD)

6.4

(0.9)

6.5

(0.8)

6.5

(0.9)

6.5

(0.8)

0.03

Physical functioning, mean (SD)

58.2

(27.5)

73.7

(22.8)

71

(24.1)

79.3

(21.5)

< 0.001

  1. Group differences are tested using ANOVA for continuous variables and chi-squared tests for discrete variables
  2. Abbreviations: SD standard deviation, HS high school, GED general educational development, BMI body mass index, MVPA moderate-to-vigorous physical activity
  3. acardiovascular disease, cancer, osteoarthritis, cognitive impairment, depression, history of falls over the last 12 months, cerebrovascular disease, chronic obstructive pulmonary disease, diabetes, vision impairment, hearing loss
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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