Table 4 Summary of the main individual results of the eligible studies included in the qualitative analysis that used only artificial fluoridated water

Maia et al. [31]

48

0.6–0.8

0.45

+

2 (4%)

< 0.6 ppm = 30 (62.5%)

> 0.8 ppm = 16 (33.5%)

Lima et al. [36]

764

0.6–0.9

0.68

+

8 (50%)**

8 (50%)^#

Moura et al. [26]

180

0.60–0.80

0.623

0.168

32 (53.3%)**

< 0.6 ppm = 22 (36.7%)^#

> 0.8 ppm = 6 (10%)^#

Piva et al. [37]

104

0.6–0.9

0.66

+

66 (61.1%)

38 (38.9%)^##

Amaral et al. [32]

630

0.6–0.8

0.7

+

535 (84.92%)

< 0.6 ppm = 18 2.86%)

> 0.8 ppm = 77 (12.2%)

Silva et al. [30]

576

0.6–0.8

0.24 (Teresina)

0.27 (Floriano)

0.17 (Parnaíba)

0.07 (Teresina)

0.06 (Floriano)

0.03 (Parnaíba)

25 (4.3%)

< 0.6 ppm = 551 (95.7%)

> 0.8 ppm = 0

Panizzi et al. [38]

989

0.7–1.0 (I)

0.7–0.9 (II)

0.65–0.94 (III)

0.89

+

455 (46%)

316 (32%)

425 (43%)

534 (54%)^##

673 (68%)^##

564 (57%)^##

Saliba et al. [33]

864

0.6–0.8

+

+

669 (77.4%)

< 0.6 ppm = 171 (13.5%)

> 0.8 ppm = 24 (2.7%)

Peixoto et al. [29]

72

0.6–0.8 (I)

0.55–0.84 (II)

0.55

0.19

I—34 (47.2%)

II—46 (63.9%)

I—< 0.6 ppm = 32 (44.4%)

> 0.8 ppm = 6 (8.3%)

II—< 0.55 ppm = 26 (36.1%)

> 0.84 ppm = 0

Moimaz et al. [34]

6862

0.6–0.8

0.64

0.28

3671 (53.5%)

< 0.6 ppm = 2084 (30.4%)

> 0.8 ppm = 1107 (16.1%)

Assaf et al. [35]

179^⁋

0.65–0.94

+

+

87 (48.6%)

< 0.65 ppm = 92 (51.4%)

> 0.94 ppm = 0

Bergamo et al. [17]

252^⁋

0.55–0.84

0.77

+

217 (86%)

35 (14%)^##

Brito et al. [39]

121

0.6 a 0.9 (I)

0.65 a 0.94 (II)

0.57

0.12

I—48 (39.7%)

II—26 (21.4%)

I—< 0.6 ppm = 73 (60.3%)

> 0.9 ppm = 0 (0%)

II—< 0.65 ppm = 95 (78.6%)

> 0.94 = 0 (0%)

Kuhnen et al. [40]

737

0.7 a 1.0 (I)

0.65 a 0.94 (II)

+

+

I—432 (58.6%)

II—377 (51.2%)

I—< 0.7 ppm = 49 (6.7%)

> 1.0 ppm = 256 (34.7%)

II—< 0.65 ppm = 29 (3.8%)

> 0.94 = 331 (45%)