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Table 3 Prevention and screening actions by randomization group and strata (Mean ± SD)

From: Improving chronic disease prevention and screening in primary care: results of the BETTER pragmatic cluster randomized controlled trial

  Control PF only PP only PF/PP P value*
All patients; N 183 150 209 235  
Eligible actions 9.1 ± 3.4 8.5 ± 3.2 8.9 ± 3.2 9.2 ± 3.1 0.57
Actions met 1.9 ± 1.8 2.6 ± 2.3 4.7 ± 2.7 5.3 ± 2.6 <0.001
SQUID 21.0 ± 17.5 28.4 ± 23.6 53.6 ± 26.0 58.4 ± 23.8 <0.001
Adjusted SQUID 23.1 (19.2 – 27.1) 28.5 (20.9 – 36.0) 55.6 (49.0 – 62.1) 58.9 (54.7 – 63.1)  
Stratum 1:      
General health patients: N 119 107 129 158
Eligible actions 8.9 ± 3.3 8.4 ± 3.1 8.5 ± 3.0 9.0 ± 3.0 0.80
Actions met 1.9 ± 1.7 2.7 ± 2.3 4.8 ± 2.5 5.3 ± 2.5 <0.001
SQUID 21.5 ± 16.8 30.3 ± 24.1 57.7 ± 25.1 59.7 ± 23.4 <0.001
Adjusted SQUID 23.5 (19.3 – 27.7) 31.6 (22.9 – 40.4) 60.0 (52.8 – 67.2) 60.3 (55.6 , 65.1)  
Stratum 2:      
Mental health patients; N 64 43 80 77
Eligible actions 9.5 ± 3.5 8.8 ± 3.4 9.6 ± 3.3 9.6 ± 3.5 0.56
Actions met 1.9 ± 1.8 2.4 ± 2.2 4.5 ± 2.9 5.3 ± 2.9 <0.001
SQUID 20.1 ± 18.7 23.6 ± 21.7 47.1 ± 26.2 55.7 ± 24.8 <0.001
Adjusted SQUID 21.0 (13.3 – 28.8) 21.3 (11.9 – 30.6) 46.6 (39.4 – 53.7) 57.0 (52.3 – 61.7)  
  1. PF: Practice Facilitator (practice-level intervention).
  2. PP: Prevention Practitioner (patient-level intervention).
  3. PF/PP: Combined practice-level and patient-level intervention.
  4. SQUID: Summary Quality Index defined is the ratio of the number of CDPS actions met according to pre-defined targets to the number of actions for which the patient was eligible.
  5. *P values are based on two-sided Generalized Score Tests for equality of means across 4 groups.