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Table 5 Vaccine wastage rates comparing dry and rainy seasons

From: A retrospective review of vaccine wastage and associated risk factors in the Littoral region of Cameroon during 2016–2017

Vaccinea

2016

2017

Dry season

Rainy season

χ2b

p value

Dry season

Rainy season

χ2b

p value

Children vaccinated

Doses used

Wastage

Children vaccinated

Doses used

Wastage

  

Children vaccinated

Doses used

Wastage

Children vaccinated

Doses used

Wastage

  

BCG

46,528

65,347

28.80%

41,513

62,886

33.99%

74.48

< 0.0001

46,621

72,830

35.99%

38,335

54,062

29.09%

131.16

< 0.0001

OPV

169,175

177,408

4.64%

177,908

182,830

2.69%

18.05

< 0.0001

157,827

174,001

9.30%

169,749

170,232

0.28%

376.18

< 0.0001

IPV

39,058

48,331

19.19%

45,138

53,998

16.41%

13.11

0.0003

30,332

40,522

25.15%

43,128

49,099

12.16%

252.87

< 0.0001

DPT-HepB-Hib

123,095

126,904

3.00%

136,182

138,643

1.78%

5.15

0.0232

111,558

122,948

9.26%

129,604

130,759

0.88%

240.39

< 0.0001

PCV

122,782

119,434

−2.80%

136,297

131,708

−3.48%

1.38

0.2402*

111,502

109,070

−2.23%

131,140

123,978

−5.78%

34.36

< 0.0001

Rotavirus vaccine

80,297

78,437

− 2.37%

88,538

86,789

−2.02%

0.25

0.6175*

75,031

74,839

−0.26%

86,599

84,897

−2.00%

5.96

0.0147

MR

42,743

51,316

16.71%

38,899

48,736

20.18%

20.37

< 0.0001

37,778

49,033

22.95%

28,755

33,957

15.32%

80.28

< 0.0001

YF

42,836

51,320

16.53%

38,687

48,069

19.52%

14.79

< 0.0001

40,115

49,832

19.50%

32,327

39,312

17.77%

4.45

0.0349

Total

666,514

718,497

7.23%

703,162

753,659

6.70%

5.85

0.01557

610,764

693,075

11.88%

659,637

686,296

3.88%

1245.01

< 0.0001

  1. *Statistically insignificant
  2. aVaccines: BCG bacillus Calmette-Guérin, OPV oral polio vaccine, IPV inactivated polio vaccine, DPT-HepB-Hib pentavalent vaccine: diphtheria, pertussis, and tetanus (DPT), hepatitis B (HepB) and Haemophilus influenza type b (Hib) vaccines, PCV pneumococcal conjugate vaccine, MR measles and rubella vaccines, YF yellow fever vaccine
  3. bχ2 refers to the chi square test which brings out statistical differences between number of children vaccinated and doses of vaccines used between dry and rainy seasons