Comparison sample1–28 September 2019 COVID-19 sample19 March–15 April 2020 Significance
Demographics
Mean age (SD), range 35.0 (13.5), 18–86 34.9 (13.6), 18–92 F = 0.04, p = .84
18–29 years 43.6% (720/1650) 44.6% (744/1668) ꭙ2 = 0.32, p = .57
35–54 years 45.6% (752/1650) 43.9% (732/1668) ꭙ2 = 0.96, p = .33
55 years and over 10.8% (178/1650) 11.5% (192/1668) ꭙ2 = 0.44, p = .51
Proportion female 72.9% (1203/1650) 76.9% (1282/1668) ꭙ2 = 6.67, p = .01⁎⁎
Capital city or surrounding suburbs 60.4% (932/1544) 58.7% (904/1541) ꭙ2 = 0.92, p = .34
Aboriginal or Torres Strait Islander 4.7% (55/1163) 3.3% (39/1188) ꭙ2 = 3.20, p = .07
University education 42.4% (654/1543) 41.2% (633/1535) ꭙ2 = 0.42, p = .52
Employed full or part time 60.8% (939/1544) 52.8% (811/1536) ꭙ2 = 20.17, p < .001⁎⁎⁎
Marital status 36.9% (568/1541) 34.7% (534/1539) ꭙ2 = 1.39, p = .24



Psychosocial stressors% (number) of patients who indicated the following stressors were a current concern
Relationships with friends or family 53.4% (881/1650) 52.7% (879/1668) ꭙ2 = 0.16, p = .69
Work, study, or vocational activities 47.9% (791/1650) 44.8% (748/1668) ꭙ2 = 3.20, p = .07
Physical health 37.6% (621/1650) 35.2% (587/1668) ꭙ2 = 2.14, p = .14
Finances 26.2% (432/1650) 24.6% (410/1668) ꭙ2 = 1.12, p = .29



Psychological symptoms
K-10 (mean and SD) 31.2 (7.6) 31.4 (7.8) F = 0.52, p = .47
PHQ-9 (mean and SD) 14.3 (6.2) 14.4 (6.2) F = 0.24, p = .63
GAD-7 (mean and SD) 12.1 (5.1) 12.5 (5.3) F = 4.13, p < .05⁎
Self-reported anxiety 86.2% (1317/1528) 89.3% (1341/1502) ꭙ2 = 6.74, p < .01⁎⁎
Anxiety < two weeks 3.0% (39/1317) 5.4% (73/1341) ꭙ2 = 9.97, p < .01⁎⁎
Self-reported depression 69.5% (1062/1528) 69.0% (1037/1502) ꭙ2 = 0.08, p = .78
Depression < two weeks 4.0% (43/1062) 6.8% (71/1037) ꭙ2 = 7.90, p < .01⁎⁎
Suicidal thoughts 30.6% (423/1383) 27.5% (367/1334) ꭙ2 = 3.11, p = .08
Suicidal intentions or plans 3.7% (51/1383) 2.9% (39/1334) ꭙ2 = 1.24, p = .27