Table 2.

The proportion of patients who switched to biologics out of all biologic-naïve patients on conventional systemics (switch rate) for each healthcare region and for Sweden

	2008–2009	2010–2011	2012–2013	2014–2015
Stockholm-Gotland	90/653 (13.78)	80/741 (10.80)	75/654 (11.47)	47/502 (9.36)
West	13/344 (3.78)	17/382 (4.45)	31/461 (6.72)	26/374 (6.95)
Uppsala-Örebro	10/72 (13.89)	13/92 (14.13)	25/112 (22.32)	16/88 (18.18)
South	13/189 (6.88)	31/303 (10.23)	17/363 (4.68)	45/275 (16.36)
South-East	7/72 (9.72)	21/125 (16.80)	33/140 (23.57)	29/190 (15.26)
North	19/244 (7.79)	29/293 (9.90)	16/229 (6.99)	5/105 (9.76)
Sweden	152/1574 (9.66)	191/1936 (9.87)	197/1959 (10.06)	168/1525 (11.02)

Using Chi-squared tests, statistically significant differences in switch rate were found between regions in each time period (p < 0.01)