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Table 3 Use of healthcare resources

From: Persistence, use of resources and costs in patients under migraine preventive treatment: the PERSEC study

  Non-persistent patients
N = 5414 (69.4%)
Persistent patients
N = 2390 (30.6%)
Difference (Persistent – Non-persistent)
N = 7866
Primary Care visits
 - Mean (SD) 12.0 (8.8) 9.0 (8.7) -2.98
 - CI 95% (11.8;12.2) (8.7;9.4) (-3.41; -2.56)
 - Median (P25–P75) 10 (6–15) 6 (3–12)  
 - Min-Max 0–59 0–59  
Specialist visits
 - Mean (SD) 2.2 (1.1) 1.1 (0.9) -1.07
 - CI 95% (2.1;2.2) (1.1;1.1) (-1.12; -1.01)
 - Median (P25–P75) 2 (1–3) 1 (1–1)  
 - Min-Max 0–10 0–10  
A&E admissions
 - Mean (SD) 1.3 (2.2) 0.5 (1.2) -0,86
 - CI 95% (1.3;1.4) (0.4;0.5) (-0.95; -0.76)
 - Median (P25–P75) 0 (0–5) 0 (0–0)  
 - Min-Max 0–5 0–5  
Hospital stays
 - Mean (SD) 0.2 (1.4) 0.1 (1.3) -0.03
 - CI 95% (0.1;0.2) (0.1;0.2) (-0.1; 0.03)
 - Median (P25–P75) 0 (0–0) 0 (0–0)  
 - Min-Max 0–44 0–22  
Laboratory tests
 - Mean (SD) 1.4 (1.2) 0.7 (1.1) -0.67
 - CI 95% (1.4;1.4) (0.7;0.8) (-0.72; -0.61)
 - Median (P25–P75) 1 (0–2) 0 (0–1)  
 - Min-Max 0–4 0–4  
Conventional radiology
 - Mean (SD) 1.1 (1.5) 1.0 (1.4) -0.08
 - CI 95% (1.0;1,1) (0.9;1.0) (-0.15: -0.01)
 - Median (P25–P75) 0 (0–2) 0 (0–2)  
 - Min-Max 0–5 0–5  
CT scan
 - Mean (SD) 0.1 (0.3) 0.1 (0.2) -0.02
 - CI 95% (0.1;0.1) (0;0.1) (-0.03;0)
 - Median (P25–P75) 0 (0–0) 0 (0–0)  
 - Min-Max 0–3 0–2  
MRI
 - Mean (SD) 0.1 (0.4) 0.1 (0.4) -0.01
 - CI 95% (0.1;0.1) (0.1;0.1) (-0.03;0.01)
 - Median (P25–P75) 0 (0–0) 0 (0–0)  
 - Min-Max 0–5 0–5  
Other tests
 - Mean (SD) 1.2 (1.2) 1.0 (1.1) -0.16
 - CI 95% (1.2;1.2) (1.0;1.1) (-0.22; -0.1)
 - Median (P25–P75) 1 (0–2) 1 (0–2)  
 - Min-Max 0–5 0–5  
Days of sick leave
 - Mean (SD) 14.7 (38.8) 12.0 (37.4) -2.69
 - CI 95% (13.7;15.8) (10.5;13.5) (-4.54; -0.84)
 - Median (P25–P75) 1 (1–11) 0 (0–4)  
 - Min-Max 0–365 0–365  
  1. A&E accident & emergency, CI confidence interval, CT computed tomography, MRI magnetic resonance imaging, SD standard deviation