Table 4 Meta-regression analysis of the association between PC total score and TI

Sample size

0.0001

0.0002

0.4425

0.6581

0.0003

0.0005

Publication year

-0.0213

0.0213

-1.0812

0.2796

-0.0649

0.0188

Specialist department

0.1043

0.0410

2.5408

0.011

0.0238

0.1848

Percent of males

-0.3957

0.6328

-0.6252

0.5318

-1.6359

0.8446

Percent of age ≤ 30

0.3099

0.1444

2.1454

0.0319

0.0268

0.5930

Percent of permanent nurse

-0.0920

0.2242

-0.4105

0.6815

-0.5313

0.3473

Percent of bachelor degree or above

0.6492

0.5969

1.0877

0.2767

-0.5207

1.8191