TABLE 2.

Meta-regression analysis of the effect of MET on lung tissue fibrosis scores in PF animals.

Sources of heterogeneity	P>|t|	(95% Conf. Interval)
Modeling Method	0.390	−1.573	3.696
Route of Administration	0.832	−1.863	2.266
Time of Administration	0.198	−0.499	2.118
Animal Sex	0.379	−3.520	8.474
Animal Type	0.315	−6.041	2.149
Dosage	0.306	−1.942	0.675
Year of Publication	0.336	−2.277	0.855
Manufacturers of MET	0.362	−0.652	1.631