Work-life balance predicted work ability two years later: a cohort study of employees in the Swedish energy and water sector

Table 3 Correlation matrix among variables

	Min - max	1	2	3	4	5	6	7	8	9	10	11	12	13
1. Sex	1–2
2. Age	21–64	-,09
3. Education level	1–3	.26**	−.25**
4. Company	1–3	−.02	−.02	−.11
5. Position at work	1–3	.14*	−.01	.38**	−.07
6. Experience with leadership quality^a	1–6	.06	.04	.07	.03	.19**
7. WIPL^b	1–5	−.20**	.07	−.27**	.04	−.24**	−.02
8. PLIW^b	1–5	.00	.14*	−.23**	−.024	−.11	−.02	.39**
9. Work ability compared with the lifetime best at T₀	0–10	−.03	−.10	−.10	−.14*	−.08	.06	.38**	.40**
10. Work ability regarding physical demands at T₀	1–5	−.13*	−.07	.10	.10	.14*	.19**	.24**	.14*	.46**
11. Work ability regarding mental demands at T₀	1–5	−.09	−.05	−.06	.046	−.06	.20**	.36**	.27**	.68**	.59**
12. Work ability compared with the lifetime best at T₁	0–10	−.02	−.07	−.02	.03	.02	.09	.34**	.37**	.56**	.38**	.48**
13. Work ability regarding physical demands at T₁	1–5	.08	−.09	.17*	.03	.16*	.22**	.22**	.17*	.33**	.44**	.36**	.53**
14. Work ability regarding mental demands at T₁	1–5	−.10	−.01	.03	−.05	−.02	.14*	.36**	.28**	.45**	.32**	.46**	.65**	.56**

The matrix has been calculated with Spearman’s correlation coefficient
Maximum (max), minimum (min) of the scale or index, and correlations indicated
^aExperience with leadership quality was measured with an 7 item index ranging from 1 to 6
^bWork interference with personal life (WIPL) and personal life interference with work (PLIW), was both three item index scales, ranging from 1 to 5
^cWork ability outcome in the matrix was measured at follow-up
* Correlation is significant at the 0.05 level
** Correlation is significant at the 0.01 level

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