Table 2

Sample distribution by IMS

IMS level/CertificationFrequency%
Binary IMS
0 = absence of full integration25062.50
1 = full integration15037.50
Total400100.00
Partial IMS/Number of ISO certifications adopted
0,0000 = no certification9223.00
0,3333 = one certification307.50
0,6667 = two certifications12832.00
1,0000 = three certifications15037.50
Total400100.00
Individual ISO certifications
ISO 45001 not adopted22656.50
ISO 45001 adopted17443.50
Total400100.00
ISO 14001 not adopted11929.75
ISO 14001 adopted28170.25
Total400100.00
ISO 9000 not adopted11929.75
ISO 9000 adopted28170.25
Total400100.00

Note(s): Partial IMS represents the proportion of ISO certifications adopted by the company among ISO 45001, ISO 14001, and ISO 9000. Binary IMS indicates full integration, taking the value 1 when the company simultaneously adopts the three certifications

Source(s): Prepared by the authors based on research data

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