Table 4.

Episode lengths in relation to pain site

	Study year 1 (2011–2012) (N a = 148)				Study year 2 (2012–2013) (N a = 248)				Study year 3 (2013–2014) (N a = 223)
	n	% [CI]	Episode length (median, IQR)	Episode length (mean, SD)	n	% [CI]	Episode length (median, IQR)	Episode length (mean, SD)	n	% [CI]	Episode length (median, IQR)	Episode length (mean, SD)
Cervical pain	41	27.7% [21.0–35.5%]	3 (2–7)	4.9 (3.9)	63	25.4% [20.3–31.2%]	3 (1–6)	4.3 (3.6)	50	22.4% [17.4–28.4%]	2 (1–7)	4.7 (4.7)
Thoracic pain	25	16.9% [11.6–23.9%]	3 (1–5)	4 (3.4)	49	19.8% [15.2–25.2%]	2 (1–4)	3.7 (3.6)	32	14.4% [10.3–19.6%]	2.5 (1–4)	3.5 (3.0)
Lumbopelvic pain	57	38.5% [30.9–46.7%]	3 (2–7)	4.7 (4.5)	107	43.1% [37.1–49.4]	2 (1–6)	4.1 (3.9)	109	48.9% [42.3–55.5%]	3 (2–6)	4.2 (3.8)
Multisite pain	25	16.9% [11.6–23.9%]	3 (1–6)	4.6 (4.5)	29	11.7% [8.2–16.4%]	4 (1–13)	6.7 (5.3)	32	14.3% [10.3–19.6%]	4 (2–13)	6.5 (5)

^aNumber of diagnosed spinal pain episodes per study year