Table 1.

The IES-R, DASS-21 and ISI scores of study respondents after they were approved to return to work.

	All respondents (n=673)	Workers and Technical staff (n= 551)	Management and executive staff (n = 122)	P-value
Impact of Event Scale-Revised (IES-R)
Mean IES-R score (SD)	9.8 (11.0)	9.60 (10.99)	10.58(10.93)	p = 0.374
Presence of PTSD symptoms
No PTSD like symptoms (17 or below)	547 (81.3%)	451 (81.9%)	96 (78.7%)	p=0.477
Presence of PTSD like symptoms (18 - 23)	53 (7.9%)	44 (8.0%)	9 (7.4%)
Diagnosis of PTSD (24 or above)	73 (10.8%)	56 (10.2%)	17 (13.9%)
Depression, Anxiety, Stress and Stress Scale – 21 (DASS - 21)
Mean DASS-21 Anxiety score (SD)	1.6 (3.7)	1.62 (3.89)	1.51 (2.91)	p = 0.760
DASS-21 (Anxiety)
No (0-7)	632 (93.9%)	519 (94.2%)	113 (92.6%	P=0.378
Mild (8-9)	15 (2.2%)	11 (2.0%)	4 (3.3%)
Moderate (10-14)	17 (2.5%)	12 (2.2%)	5 (4.1%)
Severe (15-19)	4 (0.6%)	4 (0.7%)	0 (0.0%)
Extremely Severe (20+)	5 (0.7%)	5 (0.9%)	0 (0.0%)
Mean DASS-21 Depression score (SD)	2.1 (4.5)	2.59 (4.86)	2.57 (4.71)	p=0.977
DASS-21 (Depression)
No (0-9)	633 (94.1%)	522 (94.7%)	111 (91.0%)	p=0.127
Mild (10-13)	15 (2.2%)	9 (1.6%)	6 (4.9%)
Moderate (14-20)	19 (2.8%)	14 (2.5%)	5 (4.1%)
Severe (21-27)	2 (0.3%)	2 (0.4%)	0 (0.0%)
Extremely Severe (28+)	4 (0.6%)	4 (0.7%)	0 (0.0%)
Mean DASS-21 Stress score (SD)	2.6 (4.8)	1.11 (0.51)	1.13 (0.44)	p = 0.440
DASS-21 (Stress)
No (0-14)	651 (96.7%)	533 (96.7%)	118(96.7%)	P=0.865
Mild (15-18)	12 (1.8%)	9 (1.6%)	3 (2.5%)
Moderate (19-25)	6 (0.9%)	5 (0.9%)	1 (0.8%)
Severe (26-33)	2 (0.3%)	2 (0.4%)	0 (0.0%)
Extremely Severe (34+)	2 (0.3%)	2 (0.4%)	0 (0.0%)
Insomnia Severity Index (ISI)
Mean ISI score (SD)	3.3 (4.4)	3.74 (4.37)	4.07 (4.41)	p=0.440
No clinically significant insomnia (0-7)	570 (84.7%)	473 (86.5%)	97 (80.2%)	p=0.217
Subthreshold insomnia (8-14)	82 (12.2%)	61 (11.2%)	21 (17.4%)
Moderately severe clinical insomnia (15-21)	13 (1.9%)	10 (1.8%)	3 (2.5%)
Severe clinical insomnia (22-28)	3 (0.4%)	3 (0.5%)	0 (0.0%)