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Table 1 Demographic variables by study groups

From: Investigating the effect of zinc supplementation on probability of relapse and mental health in patients with opioid use disorder undergoing methadone maintenance treatment

Variables

Subgroups

Intervention group

Frequency (percentage)

Control group

Frequency (percentage)

P-value

Marital status

Married

24 (70.6%)

22 (64.7%)

0.60a

Single

10 (29.4%)

12 (35.3%)

Tobacco use

Cigarette smoking

18 (52.9%)

17 (50.0%)

0.96a

Hookah

10 (29.4%)

11 (32.4%)

None

6 (17.6%)

6 (17.6%)

Occupation

Unemployed

6 (17.6%)

6 (17.6%)

0.16b

Self-employed

2 (5.9%)

8 (23.5%)

Employee

6 (17.6%)

2 (5.9%)

Worker

9 (26.5%)

4 (11.8%)

Homekeeper

3 (8.8%)

4 (11.8%)

Retired

8 (23.5%)

10 (29.4%)

Education Level

Less than diploma

24(70/6%)

22(64/7%)

.004b

Diploma

4(11.8%)

12(35.3%)

University degree

6(17.6%)

0(0.0%)

  1. aChi-square test, bFisher’s exact test