• 대한인간공학회지
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• 제29권3호
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• pp.337-345
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• 2010

The purpose of this study was to investigate the effects of sleep/wake behavior for shiftwork in air traffic controllers (ATCs) using wrist actigraph for ten workers on a continuous full-day three-team three-shift system of forward rotation including on-duty and off-duty periods. The wrist actigraph data were recorded for three days (one shift cycle) for each subject. The mean activity counts during an on-duty period progressively increased from the night, the swing, to the morning shifts. The doze length during on-duty periods showed decreases in the morning and swing shifts as compared to the night shift. Total sleep time (TST) and sleep efficiency (SE) during off-duty periods increased in the morning-1 and swing-night shift compared to the morning-2 shift. Finally, I discussed the role of doze-taking during the burden on night shift ATCs.

• 대한산업공학회지
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• 제30권3호
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• pp.181-189
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• 2004

The purpose of this study was to investigate the effects of sleep/wake behavior for shift workers in the iron and steel industry using wrist actigraph for 59 male workers on a continuous full-day three-team three-shift system of backward rotation including on-duty and off-duty periods. The wrist actigraph data were recorded for 15 days (l shift cycle) for each subject. The sleep length at home during night shift decreased significantly as compared to the morning or evening shifts. The night shift nap length increased significantly in all sections as compared to the morning or evening shifts. The nap length in the Steel Manufacturing Process and Rolling Process during night shift decreased significantly as compared to the Machine Maintenance Section, the Forwarding of Products Section, and the Field Management Section. However, the sleep length at home while off-duty period increased significantly. The percentage of nap length during night shift in the Rolling Process, Steel Manufacture Process, and the other three types of jobs was 16.0%, 20.4%, and about 50.0%, respectively. The nap length during night shift for the above 50 year olds increased significantly as compared to the below 50 year olds. Finally, we discussed the role of nap-taking during the burden on night shift workers and the increased difficulty in continuing their job.

• 성인간호학회지
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• 제20권6호
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• pp.941-949
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• 2008

Purpose: This study was conducted to describe the effects of aroma inhalation on sleep and fatigue in night shift nurses. Methods: The research design was one group pre-posttest design. The subjects were 17 night shift nurses who work at neurosurgery intensive care unit of K hospital of C university in Seoul. During three consequent night shifts, the participants were worn the Actigraph to measure the sleep pattern on their wrist since their first night shift work. The quality of sleep and fatigue was measured by survey when they awoke at 6 pm after second night shift work. And these measures were repeated during the night shifts in second and third week. Aroma inhalation was applied before going to bed after finishing each night shift work during second and third week. SPSS 12.0 program was used for data analysis. Results: There were no statistically significant differences in sleep latency and total sleeping time. However, significant differences were found in the sleep efficiency, awakening number, sleep quality, subjective symptom and intensity of fatigue. Conclusion: These results showed that aroma inhalation had positive effects on the pattern and quality of sleep and reducing fatigue in night shift nurses.

• 수면정신생리
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• 제14권1호
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• pp.20-25
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• 2007

목 적：본 연구는 양측 손목 액티그라프(wrist actigraphy：WATG) 간의 WATG 지수와 각각의 WATG와 야간수면다원검사(nocturnal polysomnography：NPSG) 간의 수면지수를 비교 분석하여 차이와 일치도를 보고자 하였다. 방 법：우수 우성인 22명(평균연령 $43.9{\pm}13.3$세, 남：여=14：8)의 치료받지 않은 일차성 수면장애를 가진 환자(primary insomnia=8, simple snorer=2, obstructive sleep apnea=12)를 대상으로 선정하였다. 대상자들은 양측 손목에 WATG를 착용한 채 1일밤 NPSG를 시행하였다. 양측 WATG 지수간을 상관관계 및 차이를 분석하였다. 각 WATG와 NPSG 간의 수면기간시간, 총수면시간, 수면 잠복기, 수면효율 및 각성 시간에 대하여 상관관계 및 차이를 분석하였다. 결 과：양측 WATG 지수간의 상관관계 분석에서 수면잠복기와 수면분절지수에서 유의한 상관관계가 없었고, 그외의 다른 수면지수들에서는 통계적으로 유의한 수준으로 양의 상관관계가 있었다(p<0.05). 양측 WATG의 수면지수 간의 양적 비교에서는 통계적으로 유의한 차이가 없었다. 각 WATG와 NPSG 수면지수 간의 상관관계 분석에서 양측 WATG 수면기간시간, 좌측 WATG의 수면잠복기 그리고 우측 WATG의 총수면시간이 유의한 양의 상관관계를 보였고, 우측 WATG의 수면효율은 유의한 음의 상관관계를 보였다. 각 WATG와 NPSG 수면지수 간의 양적 비교에서 NPSG에 비해 WATG에서 양측의 수면기간시간(p<0.001, p<0.001)과 우측의 각성시간(p<0.05)은 감소되었으며, 좌측의 수면잠복기(p<0.001)와 우측의 총수면시간과 수면효율(p<0.05, p<0.05)은 증가되었다. 결 론：양측 WATG 수면지수 간의 상관관계에서 수면잠복기와 수면분절지수의 불일치는 각성시간 동안 WATG의 활동도가 양측간에 차별적으로 발생할 수 있다는 것을 의미한다. NPSG와 각 WATG의 수면지수 상관관계에서 보여주고 있는 불일치는 일일밤 수면분석을 위해 NPSG를 대신하여 WATG를 이용하는 것에 제한된 점이 있다는 것을 시사한다.