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  • Erratum
  • Open Access

Erratum to: The effect of nocturnal blue light exposure from light-emitting diodes on wakefulness and energy metabolism the following morning

  • 1,
  • 1,
  • 2,
  • 1,
  • 3,
  • 4 and
  • 2Email author
Environmental Health and Preventive Medicine201420:422

https://doi.org/10.1007/s12199-014-0422-6

  • Published:

The original article was published in Environmental Health and Preventive Medicine 2014 19:402

Erratum to: Environ Health Prev Med (2014) 19:354–361 DOI 10.1007/s12199-014-0402-x

In the original publication of the article, Tables 1, 2 and 3 were inadvertently missed. The tables should appear as given below:
Table 1

Characteristics of the subjects

Age, year

22.7 ± 1.5

Height, cm

175.1 ± 5.0

Body weight, kg

70.8 ± 9.5

Body mass index, kg/m2

23.0 ± 2.7

Body fat percentage, %

21.1 ± 14.4

Habitual sleep duration, h

7.5 ± 0.7

Pittsburgh sleep quality index

3.8 ± 1.2

Values are mean ± SD; n = 9

Table 2

Visually scored sleep stages

 

Blue light exposure

No light

p value

Sleep

 TIB, min

480.0

480.0

 

 TST, min

448.1 ± 3.3

452.9 ± 3.6

NS

 SE, %

93.4 ± 0.7

94.5 ± 0.8

NS

 Stage 1, min

49.4 ± 6.0

41.6 ± 4.8

NS

 Stage 2, min

248.9 ± 12.1

250.7 ± 14.7

NS

 SWS, min

54.2 ± 8.0

59.6 ± 7.8

NS

 REM, min

96.9 ± 13.4

103.2 ± 12.8

NS

 NREM, min

351.2 ± 13.8

349.7 ± 12.9

NS

 WASO, min

21.1 ± 2.4

18.2 ± 3.2

NS

 SL, min

8.6 ± 2.8

5.9 ± 1.4

NS

 RL, min

96.1 ± 12.1

108.2 ± 19.2

NS

In the following morning

   

 Stage 1 and 2, min

26.0 ± 9.8

6.3 ± 2.7

<0.05

Values are mean ± SE; n = 9

TIB total time in bed, TST total sleep time, SE sleep efficiency, SWS slow wave sleep, REM rapid eye movement sleep, NREM non-rapid eye movement sleep, WASO wake after sleep onset, SL sleep latency, RL REM sleep latency

NS, p > 0.05 (Wilcoxon signed rank test)

Table 3

Heart rate and body temperature

 

Blue light exposure

No light

p

Heart rate, bpm

 Dark adaptation

62.6 ± 2.3

64.2 ± 3.2

NS

 Light exposure

58.0 ± 2.0

58.9 ± 2.7

NS

 Sleep

50.1 ± 1.8

49.7 ± 2.1

NS

 After waking

66.9 ± 2.9

67.8 ± 3.0

NS

Body temperature, °C

 Dark adaptation

36.1 ± 0.1

36.2 ± 0.1

NS

 Light exposure

35.9 ± 0.1

36.0 ± 0.1

NS

 Sleep

35.8 ± 0.1

35.8 ± 0.1

NS

 After waking

36.0 ± 0.1

36.1 ± 0.1

NS

Values are mean ± SE; n = 9

NS, p > 0.05 (Wilcoxon signed rank test)

Notes

Authors’ Affiliations

(1)
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
(2)
Faculty of Health and Sports Sciences, University of Tsukuba, Tsukuba, Japan
(3)
Graduate School of Engineering Science, Osaka University, Osaka, Japan
(4)
Faculty of Medicine, University of Tsukuba, Tsukuba, Japan

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