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Table 2 Summary of random-effects meta-analysis estimates by type of analysis

From: A meta-analysis of weight gain in first year university students: is freshman 15 a myth?

  Specification N studies N students Pooled estimate Q statistics P-Value of heterogeneity I2
Mean weight change Weighted on SE 22 5549 1.36 kg (CI: 1.15–1.57) 141.2 P < 0.001 85.1 %
Subgroup analysis By location 15 3661 USA: 1.32 kg (1.08–1.56) 90.8 P < 0.001 84.6 %
   1 120 UK: 0.83 kg (0.45–1.21) 0.00 NA NA
   5 1667 Canada: 1.71 kg (1.04–2.38) 29.7 P < 0.001 86.5 %
   1 101 Belgium: 0.97 kg (0.57–1.37) 0.00 NA NA
Subgroup analysis By body weight measurement method 4 3700 Self-report: 1.04 kg (0.63–1.44) 26.2 P < 0.001 88.6 %
   18 1849 Measured: 1.45 kg (1.21–1.69) 89.22 P < 0.001 80.9 %
Subgroup analysis By study length 8 423 <4 mths: 1.24 kg (0.96–1.53) 44.03 P < 0.001 77.3 %
   14 5126 4–8 mths: 1.47 kg (1.13–1.81) 95.74 P < 0.001 89.6 %
Subgroup analysis By gender 13 2876 Females: 1.34 kg (1.02–1.65) 59.59 P < 0.001 79.9 %
   8 1789 Males: 1.43 kg (0.90–1.97) 42.36 P < 0.001 83.5 %