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Table 1 Participant characteristics

From: St John’s wort use in Australian general practice patients with depressive symptoms: their characteristics and use of other health services

  Non-SJW user SJW user OR (95% CI) P value
Participant characteristics (N = 7112, N %)* (N = 320, N %)*   
General practitioner location     
 Urban (RRMA 1&2) 4771 (67.1) 237 (74.1) Ref 0.20
 Rural (RRMA 3-5) 2341 (32.9) 83 (25.9) 0.70 (0.41, 1.20)  
 SEIFA – IRSD (8+) 3374 (47.4) 185 (57.8) 1.54 (0.99, 2.37) 0.05
 SEIFA – IRSAD (9+)§ 3410 (47.9) 188 (58.8) 1.54 (1.00, 2.37) 0.05
Age group     
 18-34 1085 (15.4) 68 (21.5) Ref <0.001
 35-54 2974 (42.2) 176 (55.5) 0.95 (0.65, 1.41)  
 55-76 2982 (42.4) 73 (23.0) 0.42 (0.27, 0.64)  
Gender     
 Male 2419 (34.1) 48 (15.1) Ref <0.001
 Female 4680 (65.9) 270 (84.9) 2.71 (2.08, 3.54)  
Marital status     
 Never married/Single 1235 (17.5) 89 (28.3) Ref <0.001
 Widowed/Divorced/Separated 1245 (17.7) 70 (22.2) 0.81 (0.58, 1.13)  
 Married 4559 (64.8) 156 (49.5) 0.52 (0.39, 0.69)  
Born in Australia 5735 (80.8) 268 (84.3) 1.35 (0.97, 1.88) 0.07
English is first language 6710 (94.7) 308 (96.3) 1.44 (0.76, 2.71) 0.26
Lives alone 963 (13.6) 42 (13.2) 0.94 (0.67, 1.30) 0.70
Highest level of education     
 Completed year 12 or less 4038 (57.1) 133 (41.7) Ref 0.003
 Certificate/Diploma 1456 (20.6) 86 (27.0) 1.64 (1.21, 2.22)  
 Bachelor degree or higher 1584 (22.4) 100 (31.3) 1.67 (1.22, 2.29)  
Employment     
 Employed/Student 4504 (63.5) 229 (71.6) Ref 0.04
 Not employed 2209 (31.1) 74 (23.1) 0.70 (0.53, 0.92)  
 Unable to work 383 (5.4) 17 (5.3) 0.94 (0.54, 1.65)  
Pension/benefit is main source of income 1841 (26.2) 71 (22.4) 0.88 (0.66, 1.17) 0.37
Ever told by doctor had depression 1981 (30.1) 193 (65.6) 4.22 (3.27, 5.45) <0.001
Ever told by doctor had anxiety 1492 (24.0) 157 (56.7) 3.91 (2.96, 5.17) <0.001
Currently taking depression medication 962 (13.7) 84 (26.3) 2.20 (1.73, 2.80) <0.001
Long term illness/Health problem/ disability 2243 (32.3) 108 (34.5) 1.13 (0.90, 1.44) 0.29
Health rate     
 Fair/Poor 1155 (16.4) 63 (19.9) Ref 0.09
 Good/Excellent 5867 (83.6) 253 (80.1) 0.78 (0.59, 1.04)  
GP female 1915 (26.9) 122 (38.1) 1.58 (1.12, 2.24) 0.009
Seen a GP 12 or more times in past 12 months 652 (9.2) 32 (10.0) 1.11 (0.75, 1.63) 0.60
  1. OR = odds ratio. RRMA = Rural, Remote and Metropolitan Areas classification. SEIFA = Socio-Economic Indexes for Areas. IRSD = Index of Relative Socio-Economic Disadvantage. IRSAD = Index of Relative Socio-Economic Advantage/Disadvantage. *Denominators may vary due to missing data. †Odds ratios, 95% confidence intervals and P values with logistic regression using generalised estimating equations with robust standard errors. Participants were classified into deciles on the IRSD and IRSAD, based on their general practitioner’s geographic location. IRSD measures relative disadvantage so a high score implies a relative lack of disadvantage. §IRSAD provides a continuum score (or decile) of advantage (high values) to disadvantage (low values). Includes home duties, unpaid work and maternity leave.