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Table 2 Percentage (%) WG in groups exposed to different diets. The weekly WG (BW percentage increase vs. 7 days previously) and the BW percentage increase during the 6 weeks of the dietary regime are shown. For the first week (day 7 vs. day 0), data are expressed as median and quartiles (q1-q3) because the data are not normally distributed; the data for the following five weeks are expressed as average ± standard deviation because the values for percentage increase in BW showed a normal distribution. The last line presents the percentage BW increase over the 6 weeks of different dietary regimes in the studied groups (average ± standard deviation)

From: Improvement in serum lipids and liver morphology after supplementation of the diet with fish oil is more evident under regular feeding conditions than under high-fat or mixed diets in rats

  SD n3 HFD HFD + n3 CA1 CA2
day 7 vs. day 0 14.02 (13.83–14.53) 14.02 (13.61–16.02) 13.98 (13.72–19.57) 14.57 (13.61–20.11) 14.02 (13.83–21.35) 13.94 (13.61–17.55)
day 14 vs. day 7 7.17 ± 0.57 6.29 ± 1.00
↓ vs. SD
9.73 ± 3.54
↑ vs. SD
↑↑ vs. n3
7.72 ± 3.70 7.39 ± 2.43 10.03 ± 3.72
↑ vs. SD
↑↑ vs. n3
day 21 vs. day 14 4.90 ± 0.18 3.59 ± 1.31
↓ vs. SD
8.03 ± 3.82
↑ vs. SD
↑↑ vs. n3
4.10 ± 1.05
↓ vs. HFD
5.83 ± 2.26 4.23 ± 2.41
↓ vs. HFD
day 28 vs. day 21 3.68 ± 0.20 2.44 ± 1.61
↓ vs. SD
5.94 ± 2.00
↑↑ vs. SD
↑↑ vs. n3
3.62 ± 1.31
↓ vs. HFD
4.14 ± 2.32 3.36 ± 1.10
↓↓ vs. HFD
day 35 vs. day 28 3.31 ± 0.19 2.72 ± 0.51
↓ vs. SD
4.28 ± 0.71
↑↑ vs. SD
↑↑ vs. n3
3.30 ± 0.78
↓ vs. HFD
2.83 ± 1.06
↓ vs. HFD
3.03 ± 1.42
day 42 vs. day 35 1.96 ± 0.49 1.02 ± 0.51
↓↓ vs. SD
↓↓ vs. SD
4.22 ± 0.53
↑↑↑ vs. SD
↑↑↑ vs. n3
3.26 ± 1.21
↑ vs. SD
↑↑ vs. n3
1.89 ± 0.84
↓↓↓ vs. HFD
↓ vs. HFD + n3
2.24 ± 1.25
↓↓ vs. HFD
day 42 vs. day 0 28.70 ± 0.97% 25.39 ± 1.67%
P < 0.01 vs. SD
↓↓ vs. SD
36.08 ± 1.92%
P < 0.001 vs. n3 P < 0.001 vs. SD
30.33 ± 2.06%
P < 0.01 vs. n3
29.39 ± 2.07%
P < 0.01 vs. n3 P < 0.001 vs. HFD
30.68 ± 2.30%
P < 0.01 vs. n3
P < 0.01 vs. HFD
  1. Legend: ↓ - decrease, 0.01 < P < 0.05; ↓↓ - decrease, 0.001 < P < 0.01; ↓↓↓ - decrease, P < 0.001;
  2. ↑ - increase, 0.01 < P < 0.05; ↑↑ - increase, 0.001 < P < 0.01; ↑↑↑, − increase, P < 0.001.