an increasing trendP < 0.001
1 It illustrated a marked difference between age groups ( P = 0.0045) and an increasing trend of prevalence with age (χ 2 test for trend = 23.5; P < 0.001).
1 It illustrated a marked difference between age groups ( P = 0.0045) and an increasing trend of prevalence with age (χ 2 test for trend = 23.5; P < 0.001).