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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Int J Parasitol. 2009 May 20;39(13):1425–1439. doi: 10.1016/j.ijpara.2009.05.001

Table 1.

Mean relative luciferase units per million Plasmodium falciparum parasites (RPM) and related statistics obtained from independent assays of parasite lines containing the integrated luciferase cassettes.

Parasite linea Mean RPM (n) S.D. Skewnessb Kurtosisc Geo. Meand 95% CI of Geo. Mean P valuee
ALH 4.7 (9) 5.86 0.865 -0.972 2.07 0.687, 6.213 n/a
ALHi 3.8 (9) 9.13 2.044 2.548 0.44 0.069, 2.831 <0.05
ALA1 0.2 (9) 0.17 0.387 -1.566 0.13 0.055, 0.311 <0.01
ALA2 0.3 (9) 0.36 1.603 1.281 0.17 0.070, 0.401 <0.001
∂LH 0.003 (4) 0.005 0.749 -1.688 0.00004 3 × 10-8, 4 × 10-5 0.0145
HLH 6601 (5) 5086 0.323 -1.819 4917 1591, 15196 n/a
HLHi 7636 (5) 8298 0.52 -1.726 3993 720.5, 22133 ns
HLA 1791 (5) 2036 0.413 -1.975 802.3 112.7, 5713 <0.01
a

All lines were derived from the P. falciparum Dd2attB strain.

b

Skewness describes the asymmetry of the distribution. Positive values have distributions asymmetrically skewed to the right (higher values), negative values are skewed to the left (lower values).

c

Kurtosis quantifies the shape of the distribution as Gaussian or non-Gaussian. Gaussian distributions have 0 kurtosis, distributions with more values in the center have negative kurtosis, and those with more values in the tails have positive kurtosis.

d

The geometric mean is the antilog of the mean of the log-transformed values, which allows comparison of the transformed mean values in the original units. The variance of the geometric mean is captured by the 95% confidence interval (CI).

e

P values were calculated using repeated measures ANOVA such that the UpsA promoter lines constituted one group (P value= 0.003) and the hrp3 promoter lines constituted a second group (P value= 0.0056). The Dunnett’s post-test was used for between-line comparisons. The P value for the ∂LH line was derived from a paired t test using matched ALH values. n/a, not applicable.