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Table 2 Baseline information for each trial arm at the practice (cluster) level

From: A cluster randomized controlled trial of an online psychoeducational intervention for people with a family history of depression

Variables   Intervention group
(N = 10)
Mean (SD)
Control group (N = 10)
Mean (SD)
Total sample
(N = 20)
Mean (SD)
Mean no. of participating GPs per practice/cluster Range: 1, 3 1.6 (0.8) 1.5 (0.7) 1.55 (0.8)
Mean no. of GPs per practice/cluster (participating and non-participating) Range 1, 20 7.9 (4.6) 9.7 (7.2) 8.8 (5.9)
  Level N (%) N (%) N (%)
Full-time practice manager Yes 6 (60) 7 (70) 13 (65)
No 4 (40) 3 (30) 7 (35)
Billing arrangementsa Bulk-billing all patients 2 (20) 5 (50) 7 (35)
Private Billing 8 (80) 5 (50) 13 (65)
SES of Practice Locationb Rank (in Quartiles)
75–100 6 (60) 6 (60) 12 (60)
50–75 3 (40) 4 (40) 7 (35)
25–50 1 (0) 0 (0) 1 (5)
1–25 0 (0) 0 (0) 0 (0)
  1. aBulk-billing all patients refers to practices where the cost of the visit for all patients is covered by Medicare, Australia’s universal health care plan. Private billing in this case refers to practices that had either only private billing (i.e. visit paid for upfront or by a private health care fund) or a combination of private billing and bulk-billing
  2. bBased on Percentile Ranks within NSW contained in the 2011 Socioeconomic Index for Areas (SEIFA) published by the Australian Bureau of Statistics. Higher ranks indicate higher socioeconomic status