Table 2 Subgroup analysis.

From: Regular collagen peptide administration exerts anti-obesity effects in high-caloric diet-fed rodents—a systematic review with meta-analysis of animal trials

Subgroups

SMD

95% CI

p

I² (%)

95% CI

p (subgroup)

Species

     

0.85

 Rat

−2.01

−3.9; −0.1

0.04

89.1

0.8; 0.94

 

 Mouse

−1.8

−2.8; −0.8

>0.01

82.2

0.69; 0.9

 

Intervention duration

     

0.52

 <6 weeks

−2.35

−4.5; −0.17

>0.01

91

0.84; 0.95

 

 >6 weeks

−1.6

−2.3; −0.9

>0.01

72

0.48; 0.85

 

Age

     

0.15

 <8 weeks

−1.02

−1.8; −0.2

0.01

77

0.54; 0.88

 

 >8 weeks

−3.37

−5.6; −1.2

>0.01

92

0.87; 0.96

 

Supplement type

     

0.02

 Fish-derived

−2.77

−4.2; −1.4

>0.01

89

0.82; 0.93

 

 Non-fish-derived

−0.6

−1.3; 0.1

0.07

54

0; 0.83

 
  1. SMD standardized mean difference. Significant parameters in bold.