Table 2.

Descriptive statistics of the four occupational classes among 7308 female employees of the City of Helsinki aged 20–34 years

	Total				Occupational class
	N	%/(SD)	OHS visits p.a.		Managers or professionals		Semi-professionals		Routine non-manual workers		Manual workers
			N	1/ 000	N	%/(SD)	N	%/(SD)	N	%/(SD)	N	%/(SD)
Total	7308	100.0	8470	1158.9	1678	100.0	1538	100.0	3387	100.0	705	100.0
The length of the follow-up in days, average (SD)	1328	(254)			1326	(244)	1375	(202)	1310	(272)	1322	(281)
OHS visits per annum, 1 / 1000 (SD)	1158.9	(1499.2)			850.9	(1114.0)	1141.7	(1357.4)	1268.7	(1627.4)	1402.5	(1808.0)
Outcome: Trajectory group
1. No OHS visits	3623	49.6	644	177.7	972	57.9	734	47.7	1599	47.2	318	45.1
2. Low/increasing	1281	17.5	1922	1500.2	264	15.7	249	16.2	627	18.5	141	20.0
3. Low/decreasing	1651	22.6	2455	1487.0	347	20.7	397	25.8	759	22.4	148	21.0
4. High/recurrent	753	10.3	3449	4580.3	95	5.7	158	10.3	402	11.9	98	13.9
Covariates
Age (years)
20–24	2252	30.8	2693	1195.6	142	8.5	443	28.8	1412	41.7	255	36.2
25–29	3152	43.1	3565	1130.9	959	57.2	693	45.1	1233	36.4	267	37.9
30–34	1904	26.1	2212	1161.9	577	34.4	402	26.1	742	21.9	183	26.0
First Language
Finnish	6451	88.3	7627	1182.3	1403	83.6	1422	92.5	3020	89.2	606	86.0
Swedish	324	4.4	307	947.5	158	9.4	51	3.3	109	3.2	6	0.9
Other	448	6.1	479	1068.6	40	2.4	64	4.2	252	7.4	92	13.0
Education
Basic education/lower secondary	3641	49.8	4667	1281.8	273	16.3	232	15.1	2541	75.0	595	84.4
Upper secondary	2319	31.7	2565	1105.9	270	16.1	1211	78.7	755	22.3	83	11.8
Higher education	1348	18.4	1238	918.4	1135	67.6	95	6.2	91	2.7	27	3.8

Results are based on register data covering the years from 2004 to 2017.

OHS, occupational health service.