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Research Article: Mishel theory-based perioperative nursing after trabeculectomy for primary glaucoma: effects on illness uncertainty, self-management, and quality of life

Date Published: 2026-10-14

Abstract:
To evaluate the effects of a perioperative nursing intervention based on Mishel’s Uncertainty in Illness Theory in patients with primary glaucoma undergoing trabeculectomy. This single-center, two-arm, parallel-group randomized controlled study enrolled 198 patients undergoing first trabeculectomy at The First Affiliated Hospital of Suzhou University between February 2024 and December 2025. Participants were randomly allocated 1:1 to routine perioperative ophthalmic nursing or routine care plus a structured Mishel theory-based nursing intervention. Assessments were conducted 1 day before surgery (T0), at discharge (T1), and at 1 month (T2) and 3 months (T3) after surgery. The primary outcome was illness uncertainty measured using the Mishel Uncertainty in Illness Scale. Secondary outcomes included psychological status, discharge readiness, self-management, medication adherence, sleep quality, vision-related quality of life, satisfaction with nursing care, postoperative ophthalmic outcomes, and complications. All randomized participants completed follow-up and were analyzed according to their assigned groups. After Holm adjustment, the intervention group had lower illness-uncertainty scores at T1, T2, and T3; lower anxiety scores at T1 and T3 and lower depression scores at T2 and T3; higher discharge-readiness and satisfaction-with-nursing-care at T1; higher self-management and medication-adherence scores and lower sleep-quality scores at T2 and T3; and lower GQL-15 scores at T3. At T3, the model-estimated between-group differences were -8.13 points for illness uncertainty (95% CI, -10.74 to -5.53), 5.64 points for self-management (95% CI, 4.08-7.19), 6.05 points for medication adherence (95% CI, 2.98-9.12), and -3.71 points for GQL-15 (95% CI, -5.41 to -2.00). At discharge, the between-group difference in discharge readiness was 1.23 points (95% CI, 0.99-1.47). No statistically significant between-group differences were detected in postoperative intraocular-pressure trajectories, visual-acuity recovery, medication-free status, postoperative procedures, or complications within 3 months. In this single-center randomized study, Mishel theory-based perioperative nursing was associated with greater improvements in illness uncertainty and several psychological, behavioral, and recovery-related patient-reported outcomes after trabeculectomy. No statistically significant differences were detected in short-term objective ophthalmic outcomes or postoperative complications.

Introduction:
Glaucoma is a leading cause of irreversible visual impairment and blindness worldwide, and the number of affected individuals aged 40–80 years is projected to reach approximately 111.8 million by 2040 ( 1 , 2 ). Asia bears a particularly substantial share of this burden, and primary angle-closure glaucoma (PACG) is considerably more prevalent in Asian populations than in European populations ( 3 , 4 ). Elevated intraocular pressure (IOP) remains the principal modifiable risk factor for glaucomatous optic nerve…

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