Implementing post-orthodontic compliance among adolescents wearing removable retainers through Whatsapp: a pilot study

Figures & data

Figure 1 Patients allocation flow-chart.

Abbreviations: CG, control group; SG, study group.

Table 1 Demographic variables

Variable	SG (n=30)	CG (n=30)
Female, n	20	16
Age, years mean (±SD)	17.2 (±1.03)	17.8 (±1.06)
Caucasian (%)	100	100
Intercanine width (mm) (±SD)	25.34 (±0.33)	25.84 (±1.76)

Abbreviations: CG, control group; N, overall number of patients per group; SG, study group.

Table 2 Intra-group differences in intercanine width (Friedman test)

CG
Delta 0–1	Delta 1–2	Delta 2–3
***	***	***
SG
Delta 0–1	Delta 1–2	Delta 2–3
***	***	***

Notes: t₀=at baseline; t₁=after 4 months; t₂=after 8 months; t₃=after 12 months. Delta 0–1=difference between t₀ and t₁, Delta 1–2=difference between t₁ and t₂, Delta 2–3=difference between t₂ and t₃, ***P<0.001.

Abbreviations: CG, control group; SG, study group.

Table 3 Inter-groups differences in intercanine width (Mann-Whitney test)

	SG vs CG
Delta 0–1	***
Delta 1–2	***
Delta 2–3	***

Notes: t₀=at baseline; t₁=after 4 months; t₂=after 8 months; t₃=after 12 months. Delta0–1=difference between t₀ and t₁, Delta1–2=difference between t₁ and t₂, Delta2–3=difference between t₂ and t₃, ***P<0.001.

Abbreviations: CG, control group; SG, study group.

Table 4 Mean (mm) and SD of intercanine width decrease at different Delta

	CG	SG
Delta 0–1	0.097 (0.096)	0.017 (0.042)
Delta 1–2	0.795 (0.249)	0.133 (0.087)
Delta 2–3	0.412* (0.418*)	0.177 (0.084)

Notes: t₀=at baseline; t₁=after 4 months; t₂=after 8 months; t₃=after 12 months. Delta 0–1=difference between t₀ and t₁, Delta 1–2=difference between t₁ and t₂, Delta 2–3=difference between t₂ and t₃, *values calculated on 22 patients.

Abbreviations: CG, control group; SG, study group.