The Influence of Author Degree Centrality and L-Index on Scientific Performance of Physical Education and Training Papers in China Based on the Perspective of Social Network Analysis

Table 9

Degree centrality balance test.

Variable	Unmatched/matched	Mean		% reduction		t-test
		Treated	Control	% bias		t
Main journal	Unmatched	4.7676	5.0682	−8.0		−4.01	0.000	0.92
	Matched	4.7887	4.7817	0.2	97.7	0.08	0.937	0.99
Start year	Unmatched	2009	2008.9	3.0		1.54	0.124	1.12
	Matched	2009.1	2009.1	−0.3	90.5	−0.12	0.907	1.02
Career length	Unmatched	3.3256	1.4093	64.9		40.24	0.000	6.59
	Matched	3.1639	3.1619	0.1	99.9	0.02	0.981	1.00