Table 2.

Relationship of pain propensity index to personal characteristics

Characteristic	Pain propensity indexa
	Mean (95% CI)	Median	Inter‐quartile range
Sex
Male	1.4 (1.3, 1.4)	1	0–2
Female	2.2 (2.1, 2.2)	2	1–3
Age (years)
20–29	1.5 (1.4, 1.5)	1	0–2
30–39	1.8 (1.7, 1.8)	1	0–3
40–49	2.1 (2.0, 2.2)	2	0–3
50–59	2.4 (2.3, 2.5)	2	1–4
Smoking habits
Never smoked	1.9 (1.8, 1.9)	1	0–3
Ex‐smoker	2.0 (1.9, 2.1)	2	0–3
Current smoker	1.8 (1.7, 1.9)	1	0–3
Mental health
Good	1.6 (1.5, 1.7)	1	0–2
Intermediate	1.9 (1.9, 2.0)	1	0–3
Poor	2.2 (2.2, 2.3)	2	0–3
Somatising tendency (number of distressing somatic symptoms in past week)
0	1.4 (1.4, 1.5)	1	0–2
1	2.2 (2.1, 2.3)	2	1–3
≥2	3.0 (2.9, 3.2)	3	1–5

^aFor definition of pain propensity index see text.