Table 2. Overall mumps incidence rate [95% CI] during the study period in males and females (0–64 years old) in a JMDC database cohort, according to age and sex groups^a.

Sex	Target subjects (person)	Total observation period, person-years	Onset subjects, n	Mumps incidence rateb
				All ages	0–5 years oldc	6–15 years old	16–25 years old	26–35 years old	36–45 years old	46–55 years old	56–64 years old
All	5,209,660	21,007,982	68,307	325 [323–328]	1,552 [1,533–1,571]	1,186 [1,174–1,198]	52 [49–54]	71 [68–74]	44 [42–46]	15 [14–16]	8 [7–9]
Male	2,809,972	11,761,302	36,529	311 [307–314]	1,649 [1,622–1,676]	1,231 [1,214–1,249]	41 [38–44]	57 [54–60]	42 [39–44]	17 [15–19]	6 [5–8]
Female	2,399,688	9,246,680	31,778	344 [340–347]	1,449 [1,423–1,475]	1,138 [1,121–1,155]	66 [62–71]	92 [87–98]	48 [45–51]	13 [11–15]	10 [8–12]

^aBased on health insurance claims data from JMDC Inc.

^bPer 100,000 (person year).

^c‘0’ indicates ≥3 months and <1 year old.