Table 1.

Psychological distress variable items factor-loading results: children's responses (12–18 years olds).

	Question items	Factor loadings
1.	Do you cry more than usual?	0.55
2.	Do you feel tense, nervous or worried?	0.54
3.	Do you feel tired all the time?	0.54
4.	Do you have uncomfortable feelings in your stomach?	0.48
5.	Do you find it difficult to make decisions?	0.47
6.	Is your appetite poor?	0.46
7.	Do you feel more unhappy than usual?	0.45
8.	Do you feel a worthless person?	0.44
9.	Do your hands shake?	0.43
10.	Do you sleep badly?	0.43
11.	Is your digestion poor?	0.40
12.	Are you easily frightened?	0.40
13.	Do you get tired easily?	0.39
14.	Do you have trouble thinking clearly?	0.38
15.	Do find it difficult to enjoy your daily activities?	0.37
16.	Has the thought of ending your life been in your mind?	0.31
17.	Do you often have headaches?	0.31
Question items with <0.3 factor loadings: not used
18.	Is your daily work suffering?
19.	Are you able to play a useful part in life?
20.	Have you lost interest in things?