highly significantP < 0.001
The differences were highly significant at each interval (baseline: Z = −4.113, P < 0.001; 6 months: Z = −7.337, P < 0.001; 1 year: Z = −8.576, P < 0.001; 2 years: Z = −7.035, P < 0.001).
The differences were highly significant at each interval (baseline: Z = −4.113, P < 0.001; 6 months: Z = −7.337, P < 0.001; 1 year: Z = −8.576, P < 0.001; 2 years: Z = −7.035, P < 0.001).