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. 2012 Jul 23;12:162. doi: 10.1186/1471-2334-12-162

Table 3.

Percentage of subjects (with 95% confidence intervals) reporting solicited systemic symptoms within 7 days after the first and after the second dose of H1N1 vaccine in adults aged 18 to 60 years and in adults >60 years

Symptom Intensity Group A Vaccinated on Day 0 and Day 21
Group B Vaccinated on Day 0 and Day 182
Dose 1% (95% CI)
18-60 years N = 92 >60 years N = 90 18-60 years N = 70 >60 years N = 52
Fatigue
Any
43.5
28.9
38.6
34.6
(33.2-54.2)
(19.8-39.4)
(27.2-51.0)
(22.0-49.1)
Grade 3*
0.0
0.0
1.4
0.0
(0.0-3.9)
(0.0-4.0)
(0.0-7.7)
(0.0-6.8)
Headache
Any
37.0
22.2
31.4
17.3
(27.1-47.7)
(14.1-32.2)
(20.9-43.6)
(8.2-30.3)
Grade 3*
0.0
1.1
1.4
0.0
(0.0-3.9)
(0.0-6.0)
(0.0-7.7)
(0.0-6.8)
Joint pain at other location
Any
22.8
21.1
14.3
15.4
(14.7-32.8)
(13.2-31.0)
(7.1-24.7)
(6.9-28.1)
Grade 3*
0.0
0.0
0.0
0.0
(0.0-3.9)
(0.0-4.0)
(0.0-5.1)
(0.0-6.8)
Muscle aches
Any
46.7
28.9
32.9
28.8
(36.3-57.4)
(19.8-39.4)
(22.1-45.1)
(17.1-43.1)
Grade 3*
0.0
0.0
0.0
1.9
(0.0-3.9)
(0.0-4.0)
(0.0-5.1)
(0.0-10.3)
Shivering
Any
18.5
13.3
20.0
11.5
(11.1-27.9)
(7.1-22.1)
(11.4-31.3)
(4.4-23.4)
Grade 3*
0.0
1.1
0.0
0.0
(0.0-3.9)
(0.0-6.0)
(0.0-5.1)
(0.0-6.8)
Sweating
Any
13.0
11.1
10.0
13.5
(6.9-21.7)
(5.5-19.5)
(4.1-19.5)
(5.6-25.8)
Grade 3*
1.1
0.0
0.0
0.0
(0.0-5.9)
(0.0-4.0)
(0.0-5.1)
(0.0-6.8)
Fever (Axillary temp)
Any
1.1
1.1
2.9
1.9
(0.0-5.9)
(0.0-6.0)
(0.3-9.9)
(0.0-10.3)
≥39.0 to ≤40°C
0.0
0.0
0.0
0.0
(0.0-3.9)
(0.0-4.0)
(0.0-5.1)
(0.0-6.8)
 
 
Dose 2% (95% CI)
18-60 years N = 91
>60 years N = 85
18-60 years N = 60
>60 years N = 45
Fatigue
Any
53.8
31.8
51.7
29.5
(43.1-64.4)
(22.1-42.8)
(38.4-64.8)
(16.8-45.2)
Grade 3*
3.3
1.2
3.3
0.0
(0.7-9.3)
(0.0-6.4)
(0.4-11.5)
(0.0-8.0)
Headache
Any
45.1
22.4
35.0
25.0
(34.6-55.8)
(14.0-32.7)
(23.1-48.4)
(13.2-40.3)
Grade 3*
1.1
1.2
5.0
0.0
(0.0-6.0)
(0.0-6.4)
(1.0-13.9)
(0.0-8.0)
Joint pain at other location
Any
19.8
24.7
26.7
27.3
(12.2-29.4)
(16.0-35.3)
(16.1-39.7)
(15.0-42.8)
Grade 3*
0.0
0.0
0.0
0.0
(0.0-4.0)
(0.0-4.2)
(0.0-6.0)
(0.0-8.0)
Muscle aches
Any
42.9
29.4
51.7
34.1
(32.5-53.7)
(20.0-40.3)
(38.4-64.8)
(20.5-49.9)
Grade 3*
0.0
0.0
1.7
0.0
(0.0-4.0)
(0.0-4.2)
(0.0-8.9)
(0.0-8.0)
Shivering
Any
28.6
15.3
18.3
15.9
(19.6-39.0)
(8.4-24.7)
(9.5-30.4)
(6.6-30.1)
Grade 3*
1.1
1.2
0.0
0.0
(0.0-6.0)
(0.0-6.4)
(0.0-6.0)
(0.0-8.0)
Sweating
Any
20.9
16.5
13.3
9.1
(13.1-30.7)
(9.3-26.1)
(5.9-24.6)
(2.5-21.7)
Grade 3*
1.1
0.0
0.0
0.0
(0.0-6.0)
(0.0-4.2)
(0.0-6.0)
(0.0-8.0)
Fever (Axillary temp) Any
6.6
5.9
1.7
0.0
(2.5-13.8)
(1.9-13.2)
(0.0-8.9)
(0.0-8.0)
≥39.0 to ≤40°C 0.0
2.4
0.0
0.0
(0.0-4.0) (0.3-8.2) (0.0-6.0) (0.0-8.0)

*Grade 3 events were defined as events that prevent normal everyday activities (inability to attend/do work), or that require intervention of a physician/healthcare provider.