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. Author manuscript; available in PMC: 2023 Jan 1.
Published in final edited form as: Subst Abus. 2021 Sep 7;43(1):592–597. doi: 10.1080/08897077.2021.1975871

Table 3.

Factors Associated with Mobile Phone and Internet Use among People who Inject Drugs (PWID) in Fresno, California (N=494).

Total (N=494) Phone (n=380) No Phone (n=114) p a Internet (n=397) No Internet (n=96) p a

n (%) n (%) n (%) n (%) n (%)
Median age (IQR) 46 (33–54) 46 (32–53) 49 (36–56) 0.059 42 (30–51) 56 (51–59) <0.001
Gender  
 Male 299 (61) 228 (60) 71 (62) 0.450 234 (59) 64 (67) 0.153
 Female 190 (38) 147 (39) 43 (38) 160 (40) 30 (31)
 Transgender 5 (1) 5 (1) 0 (0) 3 (1) 2 (2)
Race/ethnicity
 White 211 (43) 164 (43) 47 (41) 0.129 194 (49) 17 (18) <0.001
 Hispanic/Latino 167 (34) 128 (34) 39 (34) 109 (27) 58 (60)
 American Indian/Alaskan Native 27 (5) 21 (6) 6 (5) 22 (6) 5 (5)
 Black/African American 26 (5) 25 (7) 1 (1) 22 (6) 4 (4)
 Multiracial 30 (6) 20 (5) 10 (9) 22 (6) 8 (8)
 Other 33 (7) 22 (6) 11 (10) 28 (7) 4 (4)
Marital status
 Married or in a steady relationship 247 (50) 193 (51) 54 (47) 0.352 210 (53) 37 (39) 0.008
 Single 187 (38) 146 (38) 41 (36) 147 (37) 40 (42)
 Divorced, separated, or widowed 47 (10) 33 (9) 14 (12) 33 (8) 13 (14)
Average weekly income >$250 214 (43) 168 (44) 46 (40) 0.571 181 (46) 33 (34) 0.046
Homelessb 152 (31) 89 (23) 63 (55) <0.001 110 (28) 41 (43) 0.008
Ever been enrolled in drug treatment 376 (76) 296 (78) 80 (70) 0.116 304 (77) 71 (74) 0.685
Median years injecting (IQR) 22 (7–35) 21 (7–34) 25 (9–38) 0.061 17 (5–32) 37.5 (26.75–42) <0.001
Median times injected in past month (IQR) 40 (18–90) 40 (15–90) 60 (20–90) 0.815 42 (18–90) 40 (20–71.25) 0.129
Median hours spent on the street each day (IQR)b 10 (4–19.5) 8 (3–15.75) 16 (9–24) <0.001 8 (4–18) 10 (5.75–24) 0.168
Injection drug useb
 Heroin by itself 407 (82) 310 (82) 97 (85) 0.470 318 (80) 88 (92) 0.012
 Methamphetamine by itself 280 (57) 208 (55) 72 (63) 0.138 246 (62) 34 (35) <0.001
 Heroin and methamphetamine together 196 (40) 137 (36) 59 (52) 0.004 169 (43) 27 (28) 0.013
 Heroin and powder or crack cocaine together 100 (20) 69 (18) 31 (27) 0.049 78 (20) 22 (23) 0.566
 Powder and/or crack cocaine by itself 78 (16) 56 (15) 22 (19) 0.305 63 (16) 15 (16) 1.000
Syringe sharing (receptive and/or distributive)b 194 (39) 127 (33) 67 (59) <0.001 147 (37) 46 (48) 0.065
Syringe reuseb 398 (81) 290 (76) 108 (95) <0.001 315 (79) 82 (85) 0.228

IQR=interquartile range;

a

Independent-samples t-tests for continuous variables and chi-square tests for categorical variables;

b

Past 3 months.