Table 1: Characteristics of the study population.

	Study population N (%)	Australian national data (MBS)a 2019–20 [28] N (%)
Total persons	274,420 (100%)	22,178,760 (100%)
Female	154,622 (56.3%)	11,595,257 (52.3%)
Mean age in years (SD)	43.4 (25.6)
Median age in years (Q1, Q3)	43.0 (21.9, 64.2)	–
Age group (in years)
0-9	37,525 (13.7%)	2,763,081 (12.5%)
10-19	23,822 (8.7%)	2,419,160 (10.9%)
20-29	26,817 (9.8%)	2,646,230 (11.9%)
30-39	35,999 (13.1%)	3,117,218 (14.1%)
40-49	32,094 (11.7%)	2,914,753 (13.1%)
50-59	31,891 (11.6%)	2,843,363 (12.8%)
60-69	33,685 (12.3%)	2,558,260 (11.5%)
70-79	30,651 (11.2%)	1,841,556 (8.3%)
80-89	16,704 (6.1%)	864,260 (3.9%)
90+	5,232 (1.9%)	210,879 (1.0%)
Region
Major city	184,776 (67.3%)	15,888,344 (71.6%)
Inner regional	69,311 (25.3%)	2,737,905 (12.3%)
Outer regional	20,041 (7.3%)	2,707,665 (12.2%)
Remote/ very remote	292 (0.1%)	844,227 (3.8%)
Socioeconomic status (SEIFA IRSAD quintile)
1 (most disadvantaged)	30,992 (11.3%)	3,467,086 (15.6%)
2	58,864 (21.5%)	3,563,822 (16.1%)
3	70,848 (25.8%)	4,378,392 (19.7%)
4	54,851 (20.0%)	4,626,996 (20.9%)
5 (most advantaged)	58,865 (21.5%)	6,135,506 (27.7%)

Notes: The Medicare Benefits Schedule (MBS) data collection contains information on services that qualify for a benefit under the Health Insurance Act 1973 and for which a claim has been processed. MBS data includes patients with at least 1 GP visit during 2019–20, Study population includes regular patients as defined in methods.