Fleiss1993cont: Mental Health Treatment

Description Format Source See Also Examples

Description

Meta-analysis on the Effect of Mental Health Treatment on Medical Utilisation.

Data example in Fleiss (1993) for meta-analysis with continuous outcomes.

Format

A data frame with the following columns:

study study label
year year of publication
n.psyc number of observations in psychotherapy group
mean.psyc estimated mean in psychotherapy group
sd.psyc standard deviation in psychotherapy group
n.cont number of observations in control group
mean.cont estimated mean in control group
sd.cont standard deviation in control group

Source

Fleiss JL (1993): The statistical basis of meta-analysis. Statistical Methods in Medical Research, 2, 121–45

See Also

Fleiss1993bin

Examples

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data(Fleiss1993cont)
metacont(n.psyc, mean.psyc, sd.psyc, n.cont, mean.cont, sd.cont,
         data = Fleiss1993cont,
         studlab = paste(study, year),
         comb.random = FALSE)

Example output

Loading 'meta' package (version 4.15-1).
Type 'help(meta)' for a brief overview.
                  MD             95%-CI %W(fixed)
Davis 1973   -1.5000 [-4.7855;  1.7855]       2.8
Florell 1971 -1.2000 [-2.0837; -0.3163]      38.6
Gruen 1975   -2.4000 [-6.1078;  1.3078]       2.2
Hart 1975     0.2000 [-0.7718;  1.1718]      31.9
Wilson 1977  -0.8800 [-1.9900;  0.2300]      24.5

Number of studies combined: k = 5

                        MD             95%-CI     z p-value
Fixed effect model -0.7094 [-1.2585; -0.1603] -2.53  0.0113

Quantifying heterogeneity:
 tau^2 = 0.1894 [0.0000; 5.8421]; tau = 0.4352 [0.0000; 2.4170];
 I^2 = 29.3% [0.0%; 72.6%]; H = 1.19 [1.00; 1.91]

Test of heterogeneity:
    Q d.f. p-value
 5.66    4  0.2260

Details on meta-analytical method:
- Inverse variance method
- DerSimonian-Laird estimator for tau^2
- Jackson method for confidence interval of tau^2 and tau

meta documentation built on Sept. 14, 2021, 5:14 p.m.