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Table 2 Life table summary measure for first birth intervals for Bangladesh (BDHS 2004, 2007, 2011)

From: Explaining fertility transition of a developing country: an analysis of quantum and tempo effect

Summary measures BDHS 2004 BDHS 2007 BDHS 2011
B 20 0.34 0.37 0.40
B 40 0.68 0.71 0.78
B 60 0.84 0.85 0.89
Trimean (T) 16.25 16.50 17.75
Spread (S) 20 21 26
Median (q 2 ) 20 21 22