Table 2

Comparisons of yearly mean rate of medical care visits before and after surgery/fictive surgery and between intervention and control groups

Intervention (surgery)Control (fictive surgery)Differences (between groups)
Mean
(95% CI for mean) median (min; max)
Mean
95% CI for mean median (min; max)
Mean
95% CI for mean
Children (<15 years)
n=522
 Yearly rate of medical care visits before (2 years) surgery/fictive surgery1.93 (1.82 to 2.04)
1.5 (0.5 to 8.5)
1.89 (1.79 to 1.98)
1.5 (0.5 to 7)
0.041 (−0.107 to 0.194)
 Yearly rate of medical care visits after (up to 3 years) surgery/fictive surgery0.129 (0.099 to 0.165)
0 (0 to 4.33)
0.371 (0.312 to 0.433)
0 (0 to 7)
−0.241 (−0.313 to −0.174)
 Change in rate before and after surgery/fictive surgery−1.80 (−1.90 to −1.69)
−1.5 (−7 to 1)
−1.51 (−1.61 to −1.41)
−1.33 (−7 to 4)
−0.283 (−0.436 to −0.135)
 P value<0.0001<0.00010.0002
Adults (≥15 years)
n=1122
 Yearly rate of medical care visits before (2 years) surgery/fictive surgery1.45 (1.39 to 1.51)
1 (0.5 to 10.5)
1.43 (1.38 to 1.49)
1 (0.5 to 7.5)
0.015 (−0.064 to 0.094)
 Yearly rate of medical care visits after (up to 3 years) surgery/fictive surgery0.152 (0.132 to 0.173)
0 (0 to 3)
0.248 (0.213 to 0.288)
0 (0 to 8)
−0.096 (−0.141 to −0.054)
 Change in rate before and after surgery/fictive surgery−1.30 (−1.36 to −1.24)
−1 (−10.5 to 1.5)
−1.18 (−1.24 to −1.13)
−1 (−6.83 to 6)
−0.111 (−0.195 to −0.028)
 P value<0.0001<0.00010.0097
  • P values for intervention and control groups are based on differences within groups as opposed to p values for the differences which is calculated based on differences between the intervention and control groups. Patients have contributed with their maximum number of follow-up years in the calculation of means.