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) Mean95% CI for mean median (min; max) Mean95% CI for mean Children (<15 years)n=522 Yearly rate of medical care visits before (2 years) surgery/fictive surgery 1.93 (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 surgery 0.129 (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 <0.0001 0.0002 Adults (≥15 years)n=1122 Yearly rate of medical care visits before (2 years) surgery/fictive surgery 1.45 (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 surgery 0.152 (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 <0.0001 0.0097
• 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.