Purpose：To elucidate the changes in worry related to surgery and health-related quality of life (QOL) from before admission to the initial outpatient visit after discharge with the objective of identifying suggestions for effective perioperative nursing support in gastric cancer patients undergoing surgery.Methods：A self-administered questionnaire that included the Elective Surgery Worry Assessment Tool (ESWAT) and Short Form-8 (SF-8) was conducted on gastric cancer patients undergoing surgery. Data were collected before admission (T1), on the day of admission (T2), and at the initial outpatient visit (T3). Data were analyzed using the paired t-test and one-way ANOVA with repeated measures.Results：Fifteen men and ten women (mean age, 67.9 years) were analyzed. The mean ESWAT scores were 44.5 at T1 and 50.3 at T2, a difference that was not statistically significantly (t=1.509, p=0.144). On the SF-8, Physical functioning scores were 48.9 at T1, 48.9 at T2, and 45.0 at T3 (F=3.902, p=0.040), Role physical scores were 48.9 at T1, 48.0 at T2, and 41.5 at T3 (F=6.138, p=0.004), Vitality scores were 50.5 at T1, 50.6 at T2, 47.6 at T3 (F=3.289, p=0.046), Social functioning scores were 49.6 at T1, 48.2 at T2, and 41.7 at T3 (F=8.845, p=0.001), and Role emotional scores were 48.4 at T1, 48.1 at T2, and 44.3 at T3 (F=4.747, p=0.029), confirming a main effect of time. Bodily pain scores were 52.9 at T1, 51.2 at T2, and 48.0 at T3 (F=2.764, p=0.103), General health scores were 48.1 at T1, 48.5 at T2, and 47.3 at T3 (F=0.228, p=0.740), and Mental health scores were 47.8 at T1, 47.3 at T2, and 48.1 at T3 (F=0.211, p=0.811), indicating the absence of a main effect of time.Discussion：In order to reduce the worry of gastric cancer patients undergoing surgery and to increase their health-related QOL, the perioperative management team should refer to the concepts of enhanced recovery after surgery and provide mental support as well as intervention in anticipation for postoperative reduction in physical activity and presentation of digestive and absorption disorders starting before hospitalization.目的：胃がん手術患者の効果的な周手術期看護援助の示唆を得るために，入院前から退院後初回外来受診時までの手術に関する心配事および健康関連QOLの推移を明らかにする。方法：胃がん手術患者を対象に，ESWATとSF-8を用いた自記式質問紙調査を実施した。データ収集は，入院前（T1），入院日（T2），初回外来受診時（T3）に実施した。分析は，対応のあるt検定と繰り返しのある一要因の分散分析を行った。結果：分析対象者は，男性15名，女性10名で，平均年齢67.9歳であった。ESWAT得点は，T1：44.5点，T2：50.1点であり，有意な差は認められなかった（t＝1.509，p＝0.144）。SF-8では，PFはT1：48.9点，T2：48.9点，T3：45.0点（F＝3.902，p＝0.040），RPはT1：48.9点，T2：48.0点，T3：41.5点（F＝6.138，p＝0.004），VTはT1：50.5点，T2：50.6点，T3：47.6点（F＝3.289，p＝0.046），SFはT1：49.6点，T2：48.2点，T3：41.7点（F＝8.845，p＝0.001），REはT1：48.4点，T2：48.1点，T3：44.3点（F＝4.747，p＝0.029）であり，時間の主効果が認められた。BPはT1：52.9点，T2：51.2点，T3：48.0点（F＝2.764，p＝0.103），GHはT1：48.1点，T2：48.5点，T3：47.3点（F＝0.228，p＝0.740），MHはT1：47.8点，T2：47.3点，T3：48.1点（F＝0.211，p＝0.811）であり，時間の主効果は認められなかった。考察：胃がん手術患者の手術に関する心配事を低減し，健康関連QOLを高めるためには，周手術期管理チームがERASに基づき，入院前から患者に対して，精神的支援と術後の身体活動量の低下や消化・吸収障害を見据えた介入を行っていくことが必要である。原著