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Table 1 Characteristics of study participants

From: Association between difficulty initiating sleep in older adults and the combination of leisure-time physical activity and consumption of milk and milk products: a cross-sectional study

 

All (n = 421)

Non-DIS (n = 286)

DIS (n = 135)

 

Mean ± SD

Mean ± SD

Mean ± SD

Age, years

74.9 ± 5.5

74.7 ± 5.5

75.3 ± 5.6

Women, n (%)

237 (56.3)

149 (52.1)

88 (65.2)*

Height, cm

155.2 ± 9.0

156.0 ± 8.6

153.6 ± 9.5*

Weight, kg

56.1 ± 9.6

56.9 ± 9.7

54.4 ± 9.3*

Body mass index, kg/m2

23.2 ± 2.9

23.3 ± 2.9

23.0 ± 2.8

Total sleep time, min

405.9 ± 73.4

411.6 ± 70.8

393.7 ± 77.3*

Sleep latency, min

21.1 ± 21.5

10.7 ± 5.5

43.2 ± 25.8*

Hypnotic use, n (%)

80 (19.0)

34 (11.9)

46*

Leisure-time physical activity, points

21.7 ± 25.1

23.7 ± 26.9

17.6 ± 20.5*

Milk consumption

   

Frequency, days/week

3.6 ± 2.9

3.8 ± 3.0

3.2 ± 2.9

Volume, ml/day

155.9 ± 127.1

162.9 ± 129.4

141.0 ± 121.1

Total consumption, ml/week

784.3 ± 813.4

819.0 ± 833.1

710.9 ± 767.7

Yogurt consumption

   

Frequency, days/week

4.0 ± 2.8

3.9 ± 2.9

4.1 ± 2.8

Volume, g/day

104.6 ± 79.0

100.6 ± 72.2

113.4 ± 91.9

Total consumption, g/week

506.6 ± 491.4

469.9 ± 418.7

587.1 ± 616.0*

Cheese consumption

   

Frequency, days/week

1.3 ± 1.8

1.3 ± 1.8

1.3 ± 2.0

Volume, g/day

14.3 ± 16.6

15.6 ± 17.3

11.5 ± 14.8*

Total consumption, g/week

35.6 ± 55.3

37.4 ± 56.6

31.9 ± 52.6

Total dairy consumption

   

Frequency, days/week

5.4 ± 2.4

5.4 ± 2.4

5.3 ± 2.3

Volume, g/day

193.9 ± 149.4

194.2 ± 145.0

193.5 ± 159.0

Total consumption, g/week

1357.5 ± 1045.9

1359.1 ± 1015.0

1354.3 ± 1112.9

  1. *P < 0.05 (Non-DIS vs. DIS).
  2. DIS: difficulty initiating sleep (30 min ≤ sleep latency).
  3. SD: standard deviation.