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Table 2 Pooled outcomes of all factors

From: Risk factors for neck hematoma requiring surgical re-intervention after thyroidectomy: a systematic review and meta-analysis

FactorsNo. of studiesStatistical modelMD/OR95%CIP vauleHeterogeneity
Male12random-effects1.861.60–2.17< 0.00001P = 0.03, I2 = 48%
Age6fixed-effects4.924.28–5.56< 0.00001P = 0.74, I2 = 0%
Graves Disease8fixed-effects1.811.60–2.05< 0.00001P = 0.21, I2 = 28%
Hypertension4random-effects2.271.43–3.600.0005P < 0.00001, I2 = 92%
Antithrombotic Drug used6fixed-effects1.921.51–2.44< 0.00001P = 0.20, I2 = 32%
Low-volume hospital5random-effects1.321.12–1.570.001P = 0.0001, I2 = 83%
Previous thyroid surgey7random-effects1.931.11–3.370.02P = 0.003, I2 = 69%
Bilateral thyroidectomy7fixed-effects1.191.09–1.30< 0.0001P = 0.12, I2 = 40%
Neck dissection6random-effects1.551.23–1.940.0002P = 0.09, I2 = 48%
Smoking status4random-effects1.190.99–1.420.06P = 0.02, I2 = 71%
Malignant tumor12random-effects1.000.83–1.200.97P = 0.0007, I2 = 66%
Drainage used6random-effects2.020.69–5.890.20P < 0.00001, I2 = 86%
  1. MD Mean difference, OR Odds ratio, 95% CI 95% confidence interval