Table 3

Number and rate* (95% confidence interval) of triplet and higher-order (triplet+) multiple live births in Canada (excluding Ontario) and the United States, 1991–2009
Year Canada (excluding Ontario) United States
Number of live births Triplet+ live births Number of live births Triplet+ live births
Number Rate (95% CI) Number Rate (95% CI)
1991 250847 131 52.2 (43.7-62.0) 4110907 3346 81.4 (78.7-84.2)
1992 247898 130 52.4 (43.8-62.3) 4065014 3883 95.5 (92.6-98.6)
1993 240468 196 81.5 (70.5-93.8) 4000240 4168 104.2 (101.1-107.4)
1994 238069 148 62.2 (52.5-73.0) 3952767 4594 116.2 (112.9-119.6)
1995 231813 118 50.9 (42.1-61.0) 3899589 4973 127.5 (124.0-131.1)
1996 226180 141 62.3 (52.5-73.5) 3891494 5939 152.6 (148.8-156.6)
1997 215588 218 101.1 (88.1-115.5) 3880894 6737 173.6 (169.5-177.8)
1998 209795 204 97.2 (84.4-111.5) 3941553 7625 193.5 (189.2-197.9)
1999 206169 194 94.1 (81.4-108.3) 3959417 7321 184.9 (180.7-189.1)
2000 200476 164 81.8 (69.8-95.3) 4058814 7325 180.5 (176.4-184.6)
2001 202036 202 100.0 (86.7-114.8) 4025933 7471 185.6 (181.4-189.8)
2002 200287 209 104.4 (90.7-119.5) 4021726 7401 184.0 (179.8-188.3)
2003 204279 227 111.1 (97.2-126.5) 4089950 7663 187.4 (183.2-191.6)
2004 204521 228 111.5 (97.5-127.0) 4112052 7275 176.9 (172.9-181.1)
2005 208416 187 89.7 (77.3-103.5) 4138349 6694 161.8 (157.9-165.7)
2006 219202 157 71.6 (60.9-83.8) 4265555 6540 153.3 (149.6-157.1)
2007 229428 178 77.6 (66.6-89.8) 4316233 6427 148.9 (145.3-152.6)
2008 237342 202 85.1 (73.8-97.6) 4247694 6268 147.6 (143.9-151.2)
2009 240823 201 83.5 (72.3-95.8) 4130665 6340 153.5 (149.7-157.3)

* Rates expressed per 100,000 live births.

Fell and Joseph

Fell and Joseph BMC Pregnancy and Childbirth 2012 12:103   doi:10.1186/1471-2393-12-103

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