Table 1 Baseline characteristics stratified by duration of nocturnal sleep: the Heinz Nixdorf Recall study (N=3751)

From: Associations between sleep characteristics and weight gain in an older population: results of the Heinz Nixdorf Recall Study

 

Duration of nocturnal sleep

 

<6 h

6–8 h

>8 h

N

457

3050

244

Age (years)

58.6±7.3

58.7±7.6

62.2±6.7

Men (%)

41.4

52.0

50.0

Weight (kg)

79.3±15.5

79.2±14.7

80.0±16.2

Alcohol consumption (g day−1)

7.6±14.6

8.5±14.8

9.7±17.7

Smoking (current/former/never) (%)

23.2/35.0/41.8

21.3/36.7/42.0

26.2/32.4/41.4

Accordance with dietary guidelines (low/medium/high) (%)

38.1/31.7/30.2

37.5/35.3/27.2

38.9/32.0/29.1

Metabolic equivalents/week

39.4±42.9

45.2±46.2

51.2±52.0

School education (low/medium/high) (%)

63.0/18.8/18.2

56.3/19.1/24.6

72.5/13.1/14.3

Marital stage (married) (%)

70.9

77.3

81.2

Subjective health (very good/good) (%)

33.7

52.9

48.8

Stressa

1.5±0.6

1.4±0.4

1.3±0.4

Regular daytime napping (%)

17.1

15.1

16.4

Regular difficulties falling asleep (%)

30.3

5.9

2.9

Regular difficulties maintaining sleep (%)

56.0

32.7

32.0

Regular early morning arousal (%)

32.4

7.1

2.5

Any regular sleep disturbance (%)b

64.8

36.7

33.6

Occupational status (employed) (%)c

42.9

44.0

17.2

Weight change between T0 and T1 (kg)

1.0±5.6

0.6±5.0

1.0±5.3

Weight change between T0 and T2 (kg)

1.7±6.6

1.0±6.5

0.8±6.5

Change of waist circumference between T0 and T1 (cm)

2.4±6.9

2.3±6.5

2.0±6.2

Change of waist circumference between T0 and T2 (cm)

3.9±8.1

3.6±7.5

2.8±7.3

  1. Abbreviations: T0, time of baseline visit; T1, time of second visit; T2, time of third visit.
  2. aHigher values mean higher levels of stress.
  3. bRegular difficulties falling asleep, regular difficulties maintaining sleep or regular early morning arousal.
  4. cSubjects are considered as occupied if they work at least 15 h week−1.
  5. Values are expressed as mean±s.d., or proportion (%).
Back to article page