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Table 1 Rates per patient year (95% CI) and rate ratios (95% CI) of GP consultations, tests, prescriptions and referrals from 15 years before until 10 years after a first recorded diagnosis of CFS/ME in adult cases compared with controls

From: Health care resource use by patients before and after a diagnosis of chronic fatigue syndrome (CFS/ME): a clinical practice research datalink study

  Year −15 to −11 Year −10 to −6 Year −5 to −1 Year 0 Year 1 to 5 Year 6 to 10
Total person years
 Cases 4579 12,183 24,478 6710 25,447 10,815
 Controls 4649 12,258 24,564 6710 25,038 10, 508
GP consultations
 Cases (rate) 6.42 (6.35, 6.49) 6.77 (6.72, 6.81) 8.06 (8.02, 8.09) 10.6 (10.6, 10.7) 7.11 (7.08, 7.14) 6.59 (6.54, 6.64)
 Controls (rate) 4.31 (4.25, 4.37) 4.53 (4.49, 4.56) 4.58 (4.56, 4.61) 4.29 (4.24, 4.34) 4.10 (4.07, 4.12) 4.24 (4.20, 4.28)
 Rate ratio 1.49 (1.46, 1.52) 1.50 (1.48, 1.51) 1.76 (1.75, 1.77) 2.48 (2.44, 2.51) 1.73 (1.72, 1.75) 1.56 (1.54, 1.57)
Diagnostic tests
 Cases (rate) 2.50 (2.46, 2.55) 8.01 (7.96, 8.06) 20.4 (20.3, 20.4) 37.0 (36.9, 37.2) 23.1 (23.0, 23.1) 26.4 (26.3, 26.5)
 Controls (rate) 1.53 (1.49, 1.57) 4.98 (4.94, 5.02) 9.75 (9.71, 9.79) 12.3 (12.2, 12.3) 14.2 (14.1, 14.2) 17.6 (17.5, 17.7)
 Rate ratio 1.64 (1.59, 1.68) 1.61 (1.59, 1.62) 2.09 (2.08, 2.10) 3.02 (3.00, 3.05) 1.63 (1.62, 1.64) 1.50 (1.49, 1.51)
Prescriptions
 Cases (rate) 6.83 (6.76, 6.91) 6.26 (6.21, 6.30) 6.63 (6.60, 6.67) 7.84 (7.78, 7.91) 6.48 (6.45, 6.51) 6.63 (6.58, 6.68)
 Controls (rate) 4.39 (4.33, 4.45) 3.84 (3.81, 3.88) 3.47 (3.45, 3.50) 3.34 (3.29, 3.38) 3.31 (3.29, 3.33) 3.59 (3.56, 3.63)
 Rate ratio 1.56 (1.53, 1.58) 1.63 (1.61, 1.65) 1.91 (1.89, 1.93) 2.35 (2.31, 2.39) 1.96 (1.94, 1.98) 1.85 (1.82, 1.87)
Referrals
 Cases (rate) 0.99 (0.96, 1.02) 0.86 (0.84, 0.87) 0.86 (0.85, 0.87) 1.38 (1.35, 1.41) 0.76 (0.75, 0.77) 0.71 (0.70, 0.73)
 Controls (rate) 0.65 (0.63, 0.67) 0.55 (0.54, 0.57) 0.43 (0.42, 0.43) 0.39 (0.37, 0.40) 0.38 (0.37, 0.39) 0.40 (0.39, 0.41)
 Rate ratio 1.53 (1.46, 1.60) 1.55 (1.50, 1.60) 2.02 (1.98, 2.07) 3.54 (3.39, 3.70) 2.00 (1.95, 2.05) 1.78 (1.72, 1.85)