Effect of professional certification on employees’ return-to-work rate after occupational injuries in Korea: focusing on vulnerable groups

Table 1 General characteristics of participants by return-to-work rate

	Returned to original work		Reemployed		Non-RTW		Total	P value *
	N	%	N	%	N	%	Total	P value *
Total	556	38.1	747	51.2	155	10.6	1458	< 0.0001
Age								< 0.0001
< 30	29	35.4	44	53.7	9	11.0	82
30–39	103	49.5	95	45.7	10	4.8	208
40–49	170	46.8	177	48.8	16	4.4	363
50–59	191	36.5	279	53.2	54	10.3	524
≥ 60	63	22.4	152	54.1	66	23.5	281
Sex								0.0002
Male	472	39.2	621	51.6	110	9.1	1203
Female	84	32.9	126	49.4	45	17.7	255
Marital status								0.0001
Not married	73	35.8	112	54.9	19	9.3	204
Married	436	41.3	510	48.3	110	10.4	1056
Other	47	23.7	125	63.1	26	13.1	198
Education level								< 0.0001
Less than high school	161	27.1	340	57.1	94	15.8	595
High school	284	44.6	306	48.0	47	7.4	637
College or above	111	49.1	101	44.7	14	6.2	226
Industry								< 0.0001
Manufacturing	267	48.1	243	43.8	45	8.1	555
Construction	59	15.3	274	71.0	53	13.7	386
Service	88	47.6	80	43.2	17	9.2	185
Other	142	42.8	150	45.2	40	12.1	332
Status of workers								< 0.0001
Regular worker	449	55.3	311	38.3	52	6.4	812
Daily worker	107	16.6	436	67.5	103	15.9	646
Occupational injury type								0.0088
Injury	493	37.0	698	52.3	143	10.7	1334
Disease	63	50.8	49	39.5	12	9.7	124
Number of employees								< 0.0001
< 5	106	31.6	184	54.9	45	13.4	335
5–9	100	29.1	211	61.3	33	9.6	344
10–29	136	34.5	218	55.3	40	10.2	394
≥ 30	214	55.6	134	34.8	37	9.6	385
Duration of employment								< 0.0001
< 1 year	217	23.3	595	64.0	118	12.7	930
1–less than 3 years	88	46.3	85	44.7	17	9.0	190
≥ 3 years	251	74.3	67	19.8	20	5.9	338
Disability rating								< 0.0001
1–7	18	29.5	22	36.1	21	34.4	61
8–14	430	37.8	594	52.2	114	10.0	1138
None	108	41.7	131	50.6	20	7.7	259
Certification								0.0001
Yes	255	42.7	300	50.3	42	7.0	597
No	301	35.0	447	51.9	113	13.1	861

ISSN: 1347-4715