Table 2:

Practice patterns of physicians providing psychotherapy in Ontario^*

Variable	PCP psychotherapists n = 404	PCP nonpsychotherapists n = 12 368	SDiff^†	Psychiatrist psychotherapists n = 586	Psychiatrist nonpsychotherapists n = 1564	SDiff^†
No. of outpatients
Mean (SDiff^†)	218.27 (300.20)	1425.64 (1416.39)	1.18	131.76 (165.34)	274.40 (286.26)	0.61
Median (IQR)	105 (48–272)	1118 (604–1732)	1.76	77 (40–165)	189 (87–376)	0.74
No. of new outpatients
Mean ± SD	125.12 ± 219.42	869.31 ± 1161.39	0.89	55.74 ± 85.64	162.06 ± 200.36	0.69
Median (IQR)	40 (14–146)	516 (278–939)	1.65	26 (9–69)	107 (41–210)	0.95
Annual no. of visits per outpatient
Mean ± SD	8.56 ± 7.50	2.84 ± 2.80	1.01	13.77 ± 12.72	4.22 ± 3.97	1.01
Median (IQR)	7 (4–11)	2 (2–3)	1.31	10 (5–18)	3 (2–5)	1.49
Annual no. of visits per patient, no. (%) of physicians
≤ 3	112 (27.7)	10 792 (87.3)	1.51	77 (13.1)	998 (63.8)	1.22
4–16	244 (60.4)	1475 (11.9)	1.17	340 (58.0)	534 (34.1)	0.49
≥ 17	48 (11.9)	101 (0.8)	0.47	169 (28.8)	32 (2.0)	0.80
No. of single-visit outpatients, mean (SDiff^†)	84.23 (183.55)	772.25 (1051.97)	0.91	31.95 (51.62)	117.78 (158.94)	0.73
< 200 outpatients annually, no. (%) of physicians	275 (68.1)	1383 (11.2)	1.43	478 (81.6)	810 (51.8)	0.67
< 100 outpatients annually, no. (%) of physicians	198 (49.0)	917 (7.4)	1.04	350 (59.7)	441 (28.2)	0.67
< 40 outpatients annually, no. (%) of physicians	79 (19.6)	525 (4.2)	0.49	143 (24.4)	201 (12.8)	0.30

Note: IQR = interquartile range, PCP = primary care physician, SD = standard deviation, SDiff = standardized difference.
↵* Includes all billing data for psychotherapists, not just psychotherapy data.
↵† A standardized difference of greater than 0.1 is considered clinically significant.12