showed a trendP = 0.01
Further subgroup analysis of high-income and low–middle-income countries showed a trend toward longer average D2B in low–middle-income countries (n = 2036; WMD, 19.64 minutes; 95% CI, 4.61-34.68 minutes; P = 0.01) compared with high-income countries (n = 47,469; WMD, 4.52 minutes; 95% CI, 0.80-8.25 minutes; P = 0.02).