The principal finding of this study is that functional benefit after septoplasty is not uniformly distributed among patients with septal deviation. Instead, the magnitude of improvement appears strongly related to baseline symptom burden, functional severity, and anatomical location of the deviation.

This finding is particularly relevant because septoplasty has historically been indicated largely on anatomical grounds. Yet nasal septal morphology and subjective obstruction correlate imperfectly. Objective measures such as rhinomanometry, acoustic rhinometry, CT-derived measurements, and peak nasal inspiratory flow may characterize airway geometry or resistance but have shown inconsistent ability to predict patient-perceived surgical benefit [5,11,12].

Our observation that patients with greater baseline symptoms experienced greater benefit is strongly concordant with contemporary evidence. Stewart et al. established the NOSE scale specifically to quantify disease-specific obstruction [1], and subsequent studies demonstrated marked postoperative reductions in NOSE scores [2,3,13].

More recently, the NAIROS randomized controlled trial provided high-level evidence supporting septoplasty over medical management for appropriately selected adults with at least moderate nasal obstruction [9,10]. Importantly, treatment effect increased with baseline symptom severity. Our findings independently support this concept: moderate and severe obstruction predicted greater improvement, whereas patients with minimal symptoms had less potential for meaningful benefit.

A 2023 systematic review and meta-analysis involving 2,577 patients similarly reported a pooled baseline NOSE score of approximately 68 and an improvement approaching 49 points six months after septoplasty [8]. More recent meta-analyses of randomized trials have confirmed superior patient-reported outcomes for surgery compared with non-surgical treatment [16,17].

The second major observation concerns the location of septal deviation. Patients with anterior deviation experienced particularly marked improvement. This is physiologically plausible because the anterior nasal cavity and internal nasal valve represent high-resistance segments of the nasal airway, such that relatively small structural changes can substantially influence perceived airflow.

Long-term observations by Dinis and Haider similarly suggested that patients with anterior septal deformities may obtain substantial symptomatic benefit, while simultaneously emphasizing the limitations of selecting patients solely on clinical anatomical assessment [5].

The literature is nevertheless complex. In a prospective cohort of 494 patients, Cantone et al. identified anterior septal deviation as an important determinant of outcome but also observed a greater risk of postoperative redisplacement in anterior deformities [6]. Thus, anterior deviation may represent both a strong functional target and a technically demanding anatomical phenotype.

The importance of morphology is further supported by classification studies demonstrating considerable heterogeneity among septal deformities [14,15]. Treating all deviations with an identical surgical strategy is therefore unlikely to produce uniform outcomes.

Our findings concerning Cottle areas I–III further reinforce this concept. Deformities located within functionally critical anterior segments may produce disproportionately severe symptoms relative to their apparent anatomical size. Consequently, describing only the degree of septal deviation without documenting its location may underestimate functional significance.

Conversely, structural deviation is not the sole determinant of obstruction. Allergic rhinitis, inferior turbinate hypertrophy, nasal valve dysfunction, mucosal disease, and sensory perception can contribute to persistent symptoms. Studies evaluating septoplasty with concomitant turbinate surgery have generated heterogeneous results, although recent randomized evidence suggests that selected patients with compensatory inferior turbinate hypertrophy may obtain additional subjective benefit from turbinate reduction at the cost of increased adverse events [18].

Our cohort contained a substantial prevalence of allergic rhinitis (40%). The available source dataset, however, does not provide sufficient inferential statistics to establish allergic rhinitis as an independent predictor of outcome. It should therefore not be interpreted as either protective or detrimental in this population.

The finding with the greatest clinical implications may be the persistence of dissatisfaction when surgical indication was based predominantly on the surgeon's subjective anatomical assessment. Patient and surgeon perspectives do not necessarily measure the same construct: the surgeon evaluates anatomy, whereas the patient experiences airflow limitation and its consequences.

This argues for a patient-centered selection paradigm. Septoplasty should not be viewed simply as correction of a crooked septum. The therapeutic target is clinically meaningful nasal obstruction attributable to that deviation.

A practical preoperative framework emerging from our results would therefore integrate: (1) validated symptom severity, preferably with NOSE; (2) anatomical localization of the deviation; (3) assessment of the nasal valve and turbinates; (4) identification and treatment of inflammatory disease; and (5) explicit discussion of patient expectations.

Strengths and limitations:
The principal strength of this study is the relatively large clinical cohort and the simultaneous evaluation of subjective obstruction, anatomical characteristics, and postoperative satisfaction across different follow-up periods.

Several limitations require acknowledgment. The retrospective design introduces selection and information biases. Objective airflow measurements were not available in the source dataset. Detailed multivariable effect estimates were unavailable for preparation of this manuscript. The exact sample size must also be reconciled with the original database before submission. Finally, contemporary prospective studies should combine standardized anatomical phenotyping with validated patient-reported outcomes and multivariable prediction modeling.