Evaluation of influenza vaccination coverage in Shanghai city during the 2016/17 to 2020/21 influenza seasons

Figures & data

Table 1. The number of individuals vaccinated against the seasonal influenza and its percentage over the total target population (in brackets) in Shanghai city during the 2016/2017 through to the 2020/2021 influenza seasons.

	2016-2017 (N=24197000)	2017-2018 (N=24183300)	2018-2019 (N=24237800)	2019-2020 (N=24281400)	2020-2021 (N=24871000)	Total
Gender
Female	133,386 (51.2)	149,948 (50.3)	116,506 (47.8)	229,551 (47.2)	576,751 (46.8)	1,206,141 (47.8)
Male	127,001 (48.8)	148,055 (49.7)	127,112 (52.2)	257,017 (52.8)	656,749 (53.2)	1,315,935 (52.2)
Age group
0.5–17 years	221,871 (85.2)	236,051 (79.2)	149,657 (61.4)	282,886 (58.1)	736,372 (59.7)	1,626,837 (64.5)
18–59 years	15,260 (5.9)	27,744 (9.3)	46,204 (19.0)	101,940 (21.0)	284,565 (23.1)	475,713 (18.9)
≥60 years	23,256 (8.9)	34,208 (11.5)	47,757 (19.6)	101,743 (20.9)	212,563 (17.2)	419,527 (16.6)
Immigration status
Residents	142,485 (54.7)	142,425 (47.8)	155,514 (63.8)	314,425 (64.6)	803,773 (65.2)	1,558,622 (61.8)
Migrants	117,902 (45.3)	155,578 (52.2)	88,104 (36.2)	172,143 (35.4)	429,727 (34.8)	963,454 (38.2)
Districts
Huangpu	4737 (1.8)	8636 (2.9)	5742 (2.4)	14,829 (3.1)	44,511 (3.6)	78,455 (3.1)
Xuhui	15,122 (5.8)	19,565 (6.6)	15,575 (6.4)	35,895 (7.4)	85,832 (7.0)	171,989 (6.8)
Changning	6369 (2.5)	7368 (2.5)	12,816 (5.3)	26,608 (5.4)	63,900 (5.2)	117,061 (4.6)
Jingan	8523 (3.3)	15,007 (5.0)	9653 (4.0)	25,813 (5.3)	54,540 (4.4)	113,536 (4.5)
Putuo	5855 (2.3)	7463 (2.5)	6897 (2.8)	19,904 (4.1)	55,885 (4.5)	96,004 (3.8)
Hongkou	2229 (0.9)	3669 (1.2)	3991 (1.6)	10,531 (2.2)	33,803 (2.7)	54,223 (2.2)
Yangpu	3414 (1.3)	5659 (1.9)	9284 (3.8)	24,155 (5.0)	59,137 (4.8)	101,649 (4.0)
Minhang	50,312 (19.3)	53,903 (18.1)	34,416 (14.1)	59,113 (12.2)	123,893 (10.0)	321,637 (12.8)
Baoshan	13,916 (5.3)	12,973 (4.4)	11,021 (4.5)	22,256 (4.6)	75,496 (6.1)	135,662 (5.4)
Jiading	25,918 (10.0)	30,429 (10.2)	21,230 (8.7)	41,390 (8.5)	91,726 (7.4)	210,693 (8.4)
Pudong	63,400 (24.4)	65,977 (22.1)	68,355 (28.1)	126,834 (26.1)	326,613 (26.5)	651,179 (25.8)
Jinshan	10,532 (4.0)	12,554 (4.2)	15,482 (6.4)	17,379 (3.6)	49,052 (4.0)	104,999 (4.2)
Songjiang	19,826 (7.6)	22,420(7.5)	14,382(6.0)	22,857 (4.7)	72,962 (5.9)	152,447 (6.0)
Qingpu	17,438 (6.7)	18,202 (6.1)	6519 (2.7)	16,722 (3.4)	33,936 (2.8)	92,817 (3.7)
Fengixian	9384 (3.6)	9724 (3.3)	4494 (1.8)	10,371 (2.1)	41,691 (3.4)	75,664 (3.0)
Chongming	3412 (1.3)	4454 (1.5)	3761 (1.5)	11,911 (2.5)	20,523 (1.7)	44,061 (1.8)
Total	260,387 (100.0)	298,003 (100.0)	243,618 (100.0)	486,568 (100.0)	1,233,500 (100.0)	2,522,076 (100.0)

Table 2. Influenza vaccination coverage (‰) in of the target population and 95‰ confidence intervals for Shanghai city during the 2016/2017 through 2020/2021 influenza seasons. Trend over seasons is provided as slope (annual percent change) of linear trend analysis.

	Coverage (95‰ CI)						Trend test
	2016-2017	2017-2018	2018-2019	2019-2020	2020-2021	Total	slope	p
Gender^a
Male	10.6 (10.5–10.7)	11.9 (11.9–12.0)	9.5 (9.4–9.5)	19.1 (19.0–19.1)	46.4 (46.3–46.5)	19.5 (19.4–19.5)	0.861	<0.001
Female	11.0 (10.9–11.0)	12.7 (12.7–12.8)	10.7 (10.7–10.8)	22.3(22.1–22.4)	55.4 (55.3–55.6)	22.5 (22.5–22.6)	0.872	<0.001
Age group^a
6 months −17 years	93.9 (93.6–94.3)	99.8 (99.4–10.0)	63.3 (63.0–63.6)	119.3 (118.9–119.8)	309.8 (309.2–310.4)	137.4 (137.2–137.6)	0.803	<0.001
18–59 years	0.9 (0.9–1.0)	1.7 (1.7–1.8)	2.9 (2.8–2.9)	6.3 (6.3–6.4)	17.6 (17.5–17.6)	5.9 (5.9–6.0)	0.922	<0.001
≥60 years	4.1 (4.1–4.2)	6.1 (5.9–6.1)	8.5 (8.4–8.5)	18.0 (17.9–18.1)	37.5 (37.3–37.6)	14.8 (14.8–14.9)	0.927	<0.001
Immigration status^a
Residents	9.9 (9.9–10.0)	9.9 (9.8–10.0)	10.8 (10.7–10.8)	21.7 (21.7–21.8)	17.6 (17.5–17.6)	21.6 (21.5–21.6)	0.884	<0.001
Migrants	12.0 (11.9–12.1)	15.9 (15.8–16.0)	9.1 (9.0–9.1)	17.6 (17.5–17.7)	44.0 (43.8–44.1)	19.7 (19.6–19.7)	0.818	<0.001
Districts^a
Huangpu	6.7 (6.5–6.9)	12.2 (12.0–12.4)	8.8 (8.5–9.0)	22.7 (22.3–23.0)	68.0 (67.4–68.6)	23.2 （23.0–23.4)	0.824	<0.001
Xuhui	13.3 (13.1–13.5)	17.1 (16.9–17.4)	14.3 (14.1–14.5)	33.1 (32.8–33.4)	79.0 (78.5–79.5)	31.0 (30.9–31.2)	0.838	<0.001
Changning	8.8 (8.6–9.0)	10.1(10.0–11.4)	18.5 (18.2–18.8)	38.3 (37.9–38.8)	91.9 (91.3–92.6)	33.1 (32.9–33.3)	0.886	<0.001
Jingan	7.5 (7.3–7.7)	13.2 (13.0–13.5)	9.1 (8.9–9.2)	24.2 (23.9–24.5)	51.2 (50.8–51.6)	20.8 (20.7–20.9)	0.861	<0.001
Putuo	4.3 (4.2–4.4)	5.5 (5.4–5.6)	5.4 (5.2–5.5)	15.5 (15.3–15.7)	43.5 (43.2–43.9)	14.6 (14.5–14.7)	0.839	<0.001
Hongkou	2.5 (2.4–2.6)	4.1 (4.0–4.2)	4.4 (4.2–4.5)	13.1 (13.0–13.4)	42.3 (41.9–42.8)	12.6 (12.5–12.7)	0.837	<0.001
Yangpu	2.5 (2.4–2.6)	4.1 (4.0–4.2)	7.1 (6.9–7.2)	18.4 (18.2–18.6)	45.0 (44.6–45.3)	15.2 (15.1–15.3)	0.889	<0.001
Minhang	19.7 (19.6–19.9)	21.1 (20.9–21.3)	13.6 (13.4–13.7)	23.2 (23.0–23.4)	48.6 (48.3–48.9)	25.3 (25.2–25.3)	0.700	<0.001
Baoshan	7.0 (6.8–7.1)	6.5 (6.4–6.6)	5.4 (5.3–5.5)	10.9 (10.8–11.0)	36.9 (36.6–37.2)	13.4 （13.3–13.5）	0.761	<0.001
Jiading	16.8 (16.6–17.0)	19.7 (19.4–19.9)	13.4 (13.2–13.6)	26.0 (25.8–26.3)	57.6 (57.3–58.0)	26.8 （26.7–26.9）	0.777	<0.001
Pudong	12.0 （11.9–12.1）	12.4 （12.3–12.5）	12.6 (12.5–12.7)	22.9 (22.8–23.0)	58.7 (58.5–59.0)	24.0 (23.9–24.1)	0.818	<0.001
Jinshan	13.7 (13.4–14.0)	16.3 (16.0–16.6)	19.7 (19.3–20.0)	21.6 (21.3–21.9)	60.8 (60.3–61.4)	26.7 (26.5–26.8)	0.808	<0.001
Songjiang	11.9 (11.8–12.0)	13.5 (13.3–13.6)	8.4 (8.3–8.6)	13.0 (12.8–13.1)	41.3 (41.0–41.6)	17.8 (17.7–17.9)	0.689	<0.001
Qingpu	15.4 (15.1–15.6)	16.0 (15.8–16.2)	5.4 (5.3–5.5)	13.7 (13.5–13.9)	27.8 (27.5–28.0)	15.7 (15.6–15.8)	0.444	<0.001
Fengixian	8.2 (8.1–8.4)	8.5 (8.4–8.7)	3.9 (3.8–4.0)	9.0 (8.8–9.2)	36.1 (35.8–36.5)	13.2 (13.1–13.3)	0.685	<0.001
Chongming	4.7 (4.5–4.9)	6.1 (5.9–6.3)	5.1 (4.9–5.2)	17.3 (17.0–17.6)	29.8 (29.4–30.4)	12.3 (12.2–12.4)	0.887	<0.001
Total	10.8 (10.7–10.8)	12.3 (12.3–12.4)	10.1 (10.0–10.1)	20.1 (20.0–20.2)	50.8 (50.7–50.9)	20.8 (20.7–20.8)	0.805	<0.001

^asignificant difference (p < 0.05) of coverage for influenza vaccination between different subgroups tested by χ2 test.