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Table 1 Frequency of articles using a particular statistical method

From: Systematic review of analytical methods applied to longitudinal studies of malaria

Method

All (n = 197)

1996–2006 (n = 49)

2007–2017 (n = 148)

N (%)

N (%)

N (%)

Descriptive statistics only

17 (8.6)

5 (10.2)

12 (8.1)

Contingency tables

102 (51.8)

32 (65.3)

70 (47.3)

Multiway tables

50 (25.4)

16 (32.7)

34 (23.0)

Epidemiologic statistics

37 (18.8)

12 (24.5)

25 (16.9)

t-tests

82 (41.6)

23 (46.9)

59 (39.9)

Analysis of variance

18 (9.1)

1 (2.0)

17 (11.5)

Simple linear regression

6 (3.1)

5 (10.2)

1 (0.7)

Non-parametric tests

48 (24.4)

11 (22.5)

37 (25.0)

Non-parametric correlation

21 (10.7)

3 (6.1)

18 (12.2)

Multiple regression

71 (36.0)

15 (30.6)

56 (37.8)

Poisson regression

49 (24.9)

8 (16.3)

41 (27.7)

Negative binomial regression

22 (11.2)

3 (6.1)

19 (12.8)

Survival analysis

 Kaplan–Meier estimator

59 (30.0)

11 (22.5)

48 (32.4)

 Log-rank test

36 (18.3)

7 (14.3)

29 (19.6)

 Cox model

62 (31.5)

9 (18.4)

53 (35.8)

 Other survival methods

4 (2.0)

3 (6.1)

1 (0.7)

Longitudinal analysis

 Generalized estimating equations

41 (20.8)

9 (18.4)

32 (21.6)

 Mixed-effects regression

24 (12.2)

2 (4.1)

22 (14.9)

Recurrent analysis

 Shared frailty model

2 (1.0)

–

2 (1.4)

 Andersen–Gill (AG) model

4 (2.0)

–

4 (2.7)