Table 5.

Odds ratio of return-to-work rate by certification (stratified analysis)

		Binomial *				Multinomial †
		Return-to-work				Returned to original work				Reemployed
		OR ‡	95% CI			OR ‡	95% CI			OR ‡	95% CI
Sex	Male
	Certification
	Yes	0.92	0.74	−	1.13	0.89	0.71	−	1.13	0.93	0.75	−	1.16
	No	1.00				1.00				1.00
	Female
	Certification
	Yes	4.60	2.68	−	7.91	3.21	1.74	−	5.91	5.85	3.34	−	10.27
	No	1.00				1.00				1.00
Status of workers	Regular worker
	Certification
	Yes	1.05	0.78	−	1.42	0.97	0.71	−	1.32	1.09	0.79	−	1.49
	No	1.00				1.00				1.00
	Daily worker
	Certification
	Yes	1.32	1.03	−	1.69	1.13	0.84	−	1.54	1.37	1.07	−	1.76
	No	1.00				1.00				1.00

*Return to original work group and reemployed group were integrated into the RTW group

†The non-RTW group was separate compared with the return to original work group and reemployed group

‡Statistical data estimated from a binomial/multinomial multivariate logistic regression analyses that adjusted for all other covariates excluding an interesting variant