Surgical procedures are indispensable in the treatment and management of various diseases, providing curative, palliative, and preventive benefits to patients across the globe. However, they are inherently associated with a spectrum of postoperative complications that can impact recovery, prolong hospitalization, increase healthcare costs, and, in severe cases, lead to mortality. Therefore, the accurate assessment, classification, and reporting of surgical complications are vital for enhancing patient safety, driving quality improvement, and benchmarking outcomes both within and across healthcare systems. To address this need, several classification systems have been developed over the years, with the Clavien-Dindo classification emerging as one of the most widely accepted and implemented frameworks worldwide. Originally introduced by Clavien et al. in 1992 and modified by Dindo et al. in 2004, the Clavien-Dindo classification provides a standardized, objective, and reproducible method of categorizing surgical complications based on the type of therapeutic intervention required rather than subjective clinical impressions. It ranks complications from Grade I, which includes minor deviations from a normal postoperative course, to Grade V, representing patient death.

 This systematic approach is particularly useful because of its simplicity, clarity, and applicability across a range of surgical disciplines—from general to specialized fields such as hepatobiliary, colorectal, and vascular surgery. As the healthcare landscape increasingly moves toward value-based care and outcome-driven reimbursement, the need for consistent documentation and grading of complications has become more pressing. Utilizing a validated system like Clavien-Dindo allows clinicians and researchers to identify trends, assess risk factors, and uncover preventable causes of morbidity, all of which contribute to more informed clinical decision-making and healthcare policy development. Furthermore, consistent complication grading fosters better multidisciplinary collaboration among surgical teams, anesthetists, critical care providers, and nursing staff, ultimately aiming to reduce postoperative morbidity and mortality. In recent years, prospective studies have validated the use of Clavien-Dindo in general surgery cohorts, reinforcing its practical relevance across different healthcare settings. Nevertheless, gaps still exist in population-specific data, especially in low- and middle-income countries, which highlights the importance of conducting context-specific research.

 Additionally, modern advancements such as Enhanced Recovery After Surgery (ERAS) protocols, minimally invasive techniques, and improved perioperative care demand ongoing assessment of complication patterns using robust tools. The present study aims to prospectively evaluate the incidence, types, and severity of postoperative complications in general surgery patients using the Clavien-Dindo classification. By systematically documenting these outcomes and the corresponding therapeutic responses, this research intends to generate valuable insights into the burden of surgical morbidity and support continuous improvements in surgical care.

MATERIALS AND METHODOLOGY

Study Overview

Location: Department of General Surgery, BMCRC, Ballari

Duration: 1.5 years (June 1, 2023 – November 30, 2024)

Design: Prospective observational study

• Inclusion Criteria

Patients aged 13–80 years

Undergoing open general surgeries (elective or emergency)

Provided informed consent

• Exclusion Criteria

Surgeries from other specialties (ENT, Ophthalmology, Ortho, Neurosurgery)

Patients <13 years, pregnant women, and polytrauma cases

Method of Data Collection

Postoperative complications assessed using Clavien-Dindo Classification:

Grade I–V, based on intervention required (ranging from minor deviation to death)

Sample Size

Sample size was calculated using the following formula:

 n=Z2p(1−p)h2n=h2Z2p(1−p)

• Estimated proportion (p)
• Confidence level
• Z-value (for 95% confidence level)
• Absolute precision (h)

Calculated using 12.5% complication prevalence with 7% margin of error

Minimum sample size: 86 patients

Sampling Method

Consecutive sampling: all eligible patients during the study period were included

Statistical Analysis

Data entry in Excel; analyzed with SPSS v28

Categorical data: frequency, %, Chi-square/Fisher’s Exact Test

Quantitative data: Mean ± SD, Unpaired t-test   p < 0.05 considered significant

Study Outcomes

Primary: Grade surgical complications using the Clavien-Dindo system

Secondary: Evaluate length of hospital stay, morbidity, and mortality

Side Effects: Not applicable.

RESULTS

Age Distribution

Gender  distribution

Distribution of patients according to Comorbidities

Comorbidity pattern in patients

Table 5: Distribution of cases according to diagnosis

Table 6: Distribution of patients according to the pattern of Procedure.

Figure 7: Total number of patients in various grades of complications

Table 8: Grade vs Procedure

Table 8: Zero comorbidity vs Grade

FIGURE  8

One comorbidity vs Grade

Two or more than two Comorbidity vs Grade

       FIGURE 10

Table 12: Procedure vs Grade

DISCUSSION

This prospective study analyzed postoperative complications in 95 general surgery patients using the Clavien-Dindo Classification (CDC), an objective system that categorizes complications based on severity. The findings revealed that most complications were minor (Grades 1 and 2), indicating effective perioperative management, though severe complications were more common in patients with multiple comorbidities. The majority of surgeries were performed on patients aged 51–60, with a nearly equal gender distribution. However, older adults and those with chronic conditions like hypertension and diabetes faced increased complication risks.

Common surgical procedures included open appendectomy, hernia repair, Graham’s patch repair, and modified radical mastectomy. Acute appendicitis, hollow viscus perforation, and carcinoma breast were the leading diagnoses. The study underscores the need for age- and comorbidity-specific perioperative strategies to minimize surgical risks and improve outcomes.

CONCLUSION

This prospective study utilized the Clavien-Dindo Classification (CDC) to objectively assess surgical complications in general surgery patients. Most complications were minor (Grades I & II = 73.6%), while severe complications (Grade III and above = 10.53%) were less frequent but had higher morbidity. Age and gender significantly influenced outcomes, with patients aged 51–60 showing the highest complication rates and some gender-based variation in complication types.

Comorbidities, especially hypertension and diabetes, were present in over half of the patients and strongly correlated with more severe complications, emphasizing the importance of preoperative risk assessment. Common surgeries included open appendectomies, hernia repairs, and breast procedures, reflecting the general surgical burden.

The findings highlight the value of the CDC as a reliable tool in surgical audit and suggest that better perioperative care, particularly for high-risk groups, can reduce complications. Overall, the study supports targeted, risk-based strategies to enhance patient outcomes and surgical quality.

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