Table 2 Digital economy development evaluation index system.

From: Research on the influence mechanism of digital economy on the development of the sports and health industry in China

System

Dimensionality

Index

Attribute

Digital infrastructure

Mobile phone penetration X1

+

0.0516

Number of Internet access ports X2

+

0.0887

Optical cable density X3

+

0.0414

Digital service capability

The proportion of Internet broadband users X4

+

0.0887

Number of mobile phone base stations X5

+

0.0673

Number of legal entities in the information transmission, software and information technology service industries X6

+

0.1480

Digital industry revenue generation

E-commerce sales X7

+

0.1263

Telecom main business income X8

+

0.2392

Software revenue as a percentage of GDP X9

+

0.1488