Table 1 Clinical characteristics of study subjects (n = 4780)

From: Seasonal variation in nocturnal home blood pressure fall: the Nagahama study

Age (years)

59.0 ± 12.3

  

Sex (men, %)

31.5

  

BMI (kg/m2)

22.2 ± 3.3

  

Alcohol consumption (Go/week)

3.6 ± 7.3

  

Antihypertensive medication (%)

24.5

  

Sleep duration (h)

6.7 ± 1.1

  
 

Evening

Sleeping

Morning

Home BP

 SBP (mmHg)

122 ± 16

113 ± 15

127 ± 18

 DBP (mmHg)

71 ± 10

66 ± 9

77 ± 11

 HR (beats/min)

68 ± 9

61 ± 8

66 ± 8

 Measurement

   

  1 day (n)

633

  

  2 days (n)

672

  

  3 days (n)

828

  

  4 days (n)

1044

  

  5 days (n)

1215

  

  6 days (n)

243

  

  7 days (n)

145

  

  Mean (times)

3.6 ± 1.6

  

BNP (pg/ml)

21.4 ± 20.3

  

 Renal function

   

  Serum Cre (mg/dl)

0.69 ± 0.14

  

  eGFR (ml/min/1.73 m2)

77.1 ± 14.0

  

  Urinary albumin (g/day)

12.5 ± 23.1

  
  1. Values are mean ± standard deviation or frequency. Alcohol consumption was calculated by multiplying the amount consumed in a single day and the number of drinking days per week and was described in Japanese traditional units of alcohol (Go), where 1 Go corresponds to 22 g of ethanol. Estimated glomerular filtration rate (eGFR) was calculated using the following formula: 194 × Cre−1.094 × age−0.287 × 0.739 [if female]
  2. BMI body mass index, SBP systolic blood pressure, DBP diastolic BP, HR heart rate, BNP b-type natriuretic peptide, Cre creatinine
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