Table 2.

Summary of responses (N = 164) from questionnaire relating symptoms to interference with work functioning.

Symptom	% of sample experiencing symptom	Mean score	SD	Clinically important interference1 (%)
Lack of motivation	93	1.78	0.91	59
Low energy	96	1.72	0.87	58
Low mood	98	1.68	0.88	55
Feeling physically slowed down	94	1.50	0.92	52
Anxious/tense/ nervous	96	1.55	0.90	50
Trouble concentrating	96	1.48	0.80	45
Sleepy during the day	88	1.31	0.85	40
Trouble with memory	93	1.31	0.77	39
Trouble sleeping at night	84	1.30	0.93	39
Feeling guilty/ashamed	88	1.24	0.97	38
Irritability/anger	91	1.26	0.91	36
Physical pain	76	1.18	1.10	35
Sleeping too much	80	1.26	1.00	31
Poor appetite	69	0.95	0.97	28
Suicidal thoughts	66	0.79	0.92	19

¹ Defined as a response of “Very much” or “So much that I had to stop working” to the following question: “In the past week, how have the following symptoms interfered with your ability to work?”

SD: standard deviation.