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Table 6 Means of the percentages of services delivered to clients by care plan group and audit period

From: Preventive medical care in remote Aboriginal communities in the Northern Territory: a follow-up study of the impact of clinical guidelines, computerised recall and reminder systems, and audit and feedback

Care plan group Baseline 6 months 1 year 2 years 3 years a 3 years b β* (95% CI) P for trend
  Means % (95%CI)   
0–3 years 44 (37–51) 53 (45–61) 65 (56–74) 70 (58–82) 69 (61–78) n/a 9.07 (5.64, 12.49) 0.001
4–15 years 49 (39–59) 33 (24–42) 56 (46–66) 62 (52–72) 53 (45–61) 63 (47–78) 5.21 (0.92, 9.50) 0.017
16–49 years 40 (34–46) 43 (37–49) 53 (47–60) 49 (43–56) 39 (33–44) 40 (32–47) 0.70 (-1.37,2.77) 0.508
50+ years 40 (34–47) 43 (36–50) 54 (46–61) 56 (48–63) 47 (40–54) 44 (34–54) 2.44 (0.11, 4.77) 0.040
  1. a Based on supplemented random sample (includes original panel); b Based on remaining clients of original panel sample; * β (coefficient) represents the average change in percentage of delivered services to each client with the increase of one unit of time (1 year), adjusted for the recent attendance at health centres using two-level linear random-effects model.