|
Characteristics of Studies Reporting on School Absences.* |
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| Study |
Intervention Group |
Control Group |
Duration (Months) |
Standardized Effect Size** |
||||
| N |
Mean ± SD |
Rate |
N |
Mean ± SD |
Rate |
|||
|
|
||||||||
| Charlton |
42 |
2.10 ± 11.40 |
0.18 |
37 |
4.70 ± 15.50 |
0.39 |
12 |
-0.19 |
| Christiansen |
27 |
2.39 ± 2.90 |
0.20 |
15 |
2.98 ± 3.29 |
0.25 |
12 |
-0.19 |
| Colland |
45 |
0.98 ± 1.56 |
0.16 |
34 |
0.53 ± 1.08 |
0.09 |
6 |
0.32 |
| Dahl |
9 |
0.80 ± 0.32 |
0.8 |
10 |
0.90 ± 0.32 |
0.9 |
1 |
-0.30 |
| Deaves |
32 |
3.69 ± 4.80 |
0.31 |
31 |
5.19 ± 4.80 |
0.43 |
12 |
-0.31 |
| Evans |
117 |
19.40 ± 13.90 |
1.62 |
87 |
19.70 ± 12.60 |
1.64 |
12 |
-0.02 |
| Fireman |
13 |
0.50 ± 5.06 |
0.04 |
13 |
4.60 ± 5.06 |
0.38 |
12 |
-0.78 |
| Hill |
211 |
5.43 ± 4.07 |
1.36 |
193 |
6.23 ± 4.72 |
1.56 |
4 |
-0.18 |
| Hughes |
44 |
10.70 ± 6.90 |
0.89 |
45 |
16.00 ± 15.40 |
1.33 |
12 |
-0.44 |
| Mitchell |
133 |
7.92 ± 16.48 |
1.32 |
126 |
8.48 ± 26.69 |
1.41 |
6 |
-0.03 |
| Perrin |
29 |
0.24 ± 0.90 |
0.24 |
27 |
0.22 ± 1.00 |
0.22 |
1 |
0.02 |
| Persaud |
18 |
6.40 ± 4.60 |
1.28 |
18 |
7.60 ± 5.30 |
1.52 |
5 |
-0.24 |
| Rubin |
29 |
11.90 ± 7.80 |
0.99 |
25 |
15.40 ± 15.00 |
1.28 |
12 |
-0.30 |
| Talabere |
25 |
1.36 ± 2.52 |
0.45 |
25 |
2.60 ± 3.75 |
0.87 |
3 |
-0.38 |
| Toelle |
63 |
2.62 ± 3.28 |
0.44 |
51 |
2.67 ± 3.21 |
0.45 |
6 |
-0.02 |
| Wilson |
30 |
0.80 ± 2.29 |
0.80 |
29 |
1.40 ± 3.23 |
1.40 |
1 |
-0.21 |
|
* N refers to the sample size, Mean ± SD refers to the mean number of events ± standard deviation, and rate refers to the total events per person-month. ** Standardized effect size was calculated for each study by subtracting control group mean from intervention group mean and dividing by the pooled SD. | ||||||||
Guevara et al. BMC Medical Research Methodology 2004 4:17 doi:10.1186/1471-2288-4-17 |
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