Table 2.

Characteristics of 1,947 initial visit records at Balgrist University Hospital chiropractic polyclinic in 2019

Variable	N	%	95% CI
Referral sources [n = 1329; missing data = 618 (31.7%)]
Internal	769	57.9	55.2–60.5
Spine surgery division	632	82.2	79.3–84.7
Other orthopaedic divisions	81	10.5	8.6–12.9
Rheumatology	22	2.9	1.9–4.3
Sports medicine	22	2.9	1.9–4.3
Others	12	1.6	0.9–2.7
External	127	9.6	8.1– 11.3
General practitioner	89	70.1	61.6–77.4
Chiropractor	15	11.8	7.3–18.6
Gynaecologist	6	4.7	2.2–9.9
Rheumatologist	5	3.9	1.7–8.9
Neurosurgeon	4	3.1	1.2–7.8
Others	12	6.3	3.2–11.9
Self-referral	433	32.6	30.1–35.1
Treatment provider (n = 1947; no missing data)
Intern	907	46.6	44.4–48.8
Resident	564	29.0	27.0–31.0
Senior chiropractor	476	24.4	22.6–26.4
Number of visits (n = 1947; no missing data)
1–3	739	38.0	35.8–40.1
4–7	573	29.4	27.4–31.5
8–11	304	15.6	14.1–17.3
12–15	156	8.0	6.9–9.3
16–19	88	4.5	3.7–5.5
20–29	68	3.5	2.8–4.4
30–39	17	0.9	0.5–1.4
≥ 40	2	0.1	0.0–0.4
NRS reported in initial visit report (n = 869, missing data = 1078 (55.4%))
0	3	0.3	0.1–1.0
1	2	0.2	0.1–0.8
2	15	1.7	1.0–2.8
3	13	1.5	0.9–2.5
4	38	4.4	3.2–5.9
5	66	7.6	6.0–9.5
6	91	10.5	8.6–12.7
7	150	17.3	14.9–19.9
8	256	29.5	26.5–32.6
9	102	11.7	9.8–14.0
10	133	15.3	13.1–17.9