Table 3.

Changes in presenteeism and absenteeism at pairs of time points

Presenteeism	Before Surgery to 6 Weeks After					Before Surgery to 6 Months After					Before Surgery to 1 Year After
	N	Mean Before	Mean After	Mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value
Absolute Presenteeism	85	75.4	78.7	3.3	0.1461	90	71.8	85.9	14.1	<0.0001	100	73.0	88.1	15.1	<0.0001
Full Performance (Absolute Presenteeism = 100%)	85	17.6%	18.8%	1.2%	0.8426*	90	14.4%	28.9%	14.5%	0.0187*	100	16.0%	29.0%	13.0%	0.0277*
Absenteeism (7-Day Recall)	Before Surgery to 6 Weeks After					Before Surgery to 6 Months After					Before Surgery to 1 Year After
	N	Mean Before	Mean After	mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value
How many days are you expected to work in a typical 7-day week?	79	5.15	5.06	−0.08	0.196	87	5.13	5.06	−0.07	0.3716	95	5.13	4.98	−0.14	0.0766
How many hours does your employer expect you to work in a typical 7-day week?	80	41.24	39.69	−1.54	0.3191	87	39.68	39.13	−0.55	0.8578	95	39.19	37.61	−1.58	0.1892
About how many hours altogether did you work in the past 7 days?	80	43.33	40.16	−3.17	0.4232	87	41.21	40.84	−0.36	0.9897	96	41.48	38.88	−2.60	0.1551
Absenteeism (28-Day Recall) In the past 4 weeks (28 days), how many days did you…	Before Surgery to 6 Weeks After					Before Surgery to 6 Months After					Before Surgery to 1 Year After
	N	Mean Before	Mean After	Mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value	N	Mean Before	Mean After	Mean Δ	Rank P- value
… miss work because of problems with your physical or mental health?	78	1.88	3.17	1.28	0.6838	83	1.95	0.90	−1.05	<0.0001	90	1.68	0.38	−1.29	<0.0001
… miss work because of problems with a family member's physical or mental health?	78	0.33	0.22	−0.12	0.3618	83	0.40	0.28	−0.12	0.39	90	0.39	0.28	−0.11	0.3813
… miss work for any other reason (including vacation)?	78	1.44	1.27	−0.17	0.0633	83	1.43	1.34	−0.08	0.9923	90	1.39	1.97	0.57	0.9648
… come in early, go home late, work extra from home, or work on your day off?	79	7.78	6.82	−0.96	0.3554	83	6.89	6.78	−0.10	0.6899	89	7.00	7.61	0.61	0.832

Note: P-values are from Wilcoxon signed-rank tests, except those with an asterisks, which are from two-sample test of proportions.