| Study populationPublication and registered service evaluation | 157 ACL reconstructions, April 2019 – December 2023, 5 consultant surgeons. Locally registered service evaluation PRN12527; not a closed-loop clinical audit. |
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| ACL onlyTable 1 — demographics | n = 73 (46.5%); mean age 29.2 y (SD 10.6), range 13–56; median BMI 26.1 (IQR 24.5–29.8); ASA I 56.16%, ASA II 36.99%, ASA III 1.37%. |
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| ACL + meniscusTable 1 — demographics | n = 58 (36.9%); mean age 27.1 y (SD 10.1), range 13–52; median BMI 25.8 (IQR 22.2–28.6); ASA I 65.52%, ASA II 32.76%, ASA III 0.00%. |
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| ACL + LETTable 1 — demographics | n = 7 (4.5%); mean age 20.3 y (SD 7.6), range 14–36; median BMI 22.5 (IQR 21.0–25.1); ASA I 57.14%, ASA II 42.86%, ASA III 0.00%. |
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| ACL + meniscus + LETTable 1 — demographics | n = 19 (12.1%); mean age 21.1 y (SD 7.9), range 12–43; median BMI 24.7 (IQR 21.5–29.7); ASA I 73.68%, ASA II 21.05%, ASA III 0.00%. |
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| ACL onlyTable 2 — operative duration | Median 78.0 min; IQR width 32.0 min; reference. |
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| ACL + meniscusTable 2 — operative duration | Median 86.5 min; IQR width 37.5 min; +8.5 min vs ACL only. |
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| ACL + LETTable 2 — operative duration | Median 94.0 min; IQR width 17.5 min; +16.0 min vs ACL only. |
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| ACL + meniscus + LETTable 2 — operative duration | Median 117.0 min; IQR width 26.5 min; +39.0 min vs ACL only. |
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| Complex procedures: mean additional operative timeTable 2 — operative duration | Complex procedures added a mean 14.7 minutes (95% CI 5.6–23.8, p < 0.001). |
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| OctoberTable 3 — length-of-stay predictors | +8.10 h (95% CI 2.43 to 13.78); significant. |
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| FridayTable 3 — length-of-stay predictors | +5.59 h (95% CI 0.84 to 10.33); significant. |
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| ASA IIITable 3 — length-of-stay predictors | +18.27 h (95% CI −5.24 to 41.79); non-significant. |
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| Base durationTable 3 — length-of-stay predictors | +13.29 h (95% CI −1.75 to 28.33); non-significant. |
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| ACL + LETTable 3 — length-of-stay predictors | +9.65 h (95% CI −0.47 to 19.77); non-significant. |
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| ASA IITable 3 — length-of-stay predictors | +3.99 h (95% CI −0.48 to 8.47); non-significant. |
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| SeptemberTable 3 — length-of-stay predictors | +2.76 h (95% CI −2.42 to 7.93); non-significant. |
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| MarchTable 3 — length-of-stay predictors | +2.05 h (95% CI −6.12 to 10.22); non-significant. |
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| JulyTable 3 — length-of-stay predictors | +1.34 h (95% CI −5.91 to 8.59); non-significant. |
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| FebruaryTable 3 — length-of-stay predictors | +0.81 h (95% CI −7.74 to 9.35); non-significant. |
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| ThursdayTable 3 — length-of-stay predictors | +0.69 h (95% CI −5.69 to 7.07); non-significant. |
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| MayTable 3 — length-of-stay predictors | +0.29 h (95% CI −7.97 to 8.55); non-significant. |
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| Month numberTable 3 — length-of-stay predictors | +0.27 h (95% CI −0.68 to 1.21); non-significant. |
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| TuesdayTable 3 — length-of-stay predictors | +0.13 h (95% CI −10.08 to 10.34); non-significant. |
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| Age at operation (years)Table 3 — length-of-stay predictors | +0.04 h (95% CI −0.17 to 0.25); non-significant. |
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| BMI (kg/m²)Table 3 — length-of-stay predictors | +0.04 h (95% CI −0.43 to 0.51); non-significant. |
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| ACL + meniscus + LETTable 3 — length-of-stay predictors | −1.26 h (95% CI −7.78 to 5.25); non-significant. |
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| NovemberTable 3 — length-of-stay predictors | −1.79 h (95% CI −8.04 to 4.47); non-significant. |
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| ACL + meniscusTable 3 — length-of-stay predictors | −1.81 h (95% CI −6.19 to 2.57); non-significant. |
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| AugustTable 3 — length-of-stay predictors | −1.83 h (95% CI −7.43 to 3.77); non-significant. |
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| AprilTable 3 — length-of-stay predictors | −2.28 h (95% CI −13.86 to 9.30); non-significant. |
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| JuneTable 3 — length-of-stay predictors | −2.72 h (95% CI −10.58 to 5.14); non-significant. |
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| WednesdayTable 3 — length-of-stay predictors | −3.47 h (95% CI −9.37 to 2.44); non-significant. |
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| DecemberTable 3 — length-of-stay predictors | −6.45 h (95% CI −13.09 to 0.19); non-significant. |
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| Isolated ACLTable 4 — complications | 3 complications (4.1%). |
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| Complex proceduresTable 4 — complications | 7 complications (8.3%). |
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| Overall complicationsTable 4 — complications | Overall 10/157 (6.4%); isolated ACL vs complex procedures, p = 0.038. |
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| HaemarthrosisTable 4 — complications | 4 (2.5%). |
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| InfectionTable 4 — complications | 3 (1.9%). |
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| Mean age with complicationsTable 4 — complications | 46.0 y (95% CI 39.2–52.8). |
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| Mean age without complicationsTable 4 — complications | 26.6 y (95% CI 24.9–28.3). |
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| Age difference with vs without complicationsTable 4 — complications | Age difference 19.4 y, p = 0.010. |
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| Revision surgeryTable 4 — complications | No revision surgery required. |
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| Age vs operative timeArticle text — other reported statistics | r = −0.31 (p < 0.001). |
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| BMI vs operative timeArticle text — other reported statistics | r = −0.17 (p = 0.046). |
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| Operative time vs LOSArticle text — other reported statistics | r = 0.16 (p = 0.041). |
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| Age independently predicted shorter operative timeArticle text — other reported statistics | −0.696 min per year (p = 0.005). |
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| ASA III prolonged LOSArticle text — other reported statistics | HR 0.440 (95% CI 0.276–0.704, p = 0.001). |
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| ACL + LET prolonged LOSArticle text — other reported statistics | HR 0.466 (95% CI 0.250–0.866, p = 0.016). |
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| ANOVA by procedure typeArticle text — other reported statistics | F = 12.0 (p < 0.001). |
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| ANOVA: LETArticle text — other reported statistics | F = 28.3 (p < 0.001). |
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| ANOVA: meniscal repairArticle text — other reported statistics | F = 9.8 (p = 0.002). |
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| BMI distributionArticle text — other reported statistics | Range 16.6–42.7 kg/m², mean 26.4. |
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| Age distributionArticle text — other reported statistics | Positively skewed (0.71). |
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| Analysis methodsReported analysis methods | Python 3.13.1; Shapiro–Wilk, D’Agostino, Anderson–Darling; outliers flagged at BMI > 50 or operative duration > 3 SD. |
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