Table 2.
Perinatal marijuana use in a longitudinal cohort by survey self-report, urine and serum (N=46)
| Marijuana Use Measure | Visit 1 <16 wks |
Visit 2 18-22 wks |
Visit 3 32-36 wks |
Visit 4 Delivery |
|---|---|---|---|---|
| n=46 | n=43 | n=39 | n=36 | |
| Any marijuana use (self, urine, or serum) | 39 (85) | 34 (79) | 22 (56) | 15 (42) |
| n=45 * | n=43 | n=39 | n=35 | |
| Self-report | ||||
| ongoing use | 16 (36) | 16 (37) | 10 (26) | 10 (29) |
| plans to stop, has not yet stopped | 11 (24) | 5 (12) | 4 (10) | 0 (0) |
| reports quit, used within 24 hrs | 2 (4) | 2 (5) | 0 (0) | 0 (0) |
| reports quit, used < 30 days ago | 5 (11) | 7 (16) | 5 (13) | 4 (11) |
| reports quit, last use > 30 days ago | 11 (24) | 13 (30) | 20 (51) | 21 (60) |
| n=44 * | n=43 | n=36 | n=33 | |
| Days of use in past 30 days by self-report | ||||
| Zero days | 10 (23) | 11 (26) | 18 (50) | 19 (58) |
| 1-6 days | 4 (9) | 8 (19) | 7 (19) | 3 (9) |
| 7-13 days | 5 (11) | 6 (14) | 2 (6) | 1 (3) |
| 14-20 days | 8 (18) | 6 (14) | 6 (17) | 4 (12) |
| 21-30 days | 17 (39) | 12 (28) | 3 (8) | 6 (18) |
| n=44 * | n=43 | n=36 | n=33 | |
| Number of uses per day | ||||
| One time | 15 (33) | 12 (30) | 17 (52) | 13 (39) |
| Two to three times | 18 (39) | 18 (45) | 11 (33) | 18 (55) |
| Four to five times | 13 (28) | 10 (25) | 4 (12) | 1 (3) |
| More than five times | 0 (0) | 0 (0) | 1 (3) | 1 (3) |
| n=46 * | n=42 | n=36 | n=34 | |
| Type of marijuana use | ||||
| Buds (flowers) | 42 (91) | 37 (88) | 33 (92) | 33 (97) |
| Edibles | 13 (28) | 16 (38) | 7 (19) | 12 (35) |
| Concentrate (hash, oil, wax, shatter) | 14 (30) | 10 (24) | 8 (22) | 6 (18) |
| Drinks | 1 (2) | 1 (2) | 0 (0) | 0 (0) |
| Tincture (under the tongue) | 2 (4) | 4 (10) | 2 (6) | 2 (6) |
| Topical (spray, lotion, skin product) | 2 (4) | 5 (12) | 2 (6) | 2 (6) |
| Other | 1 (2) | 0 (0) | 2 (6) | 0 (0) |
| n=43 | n=41 | n=39 | n=36 | |
| Urine THC-COOH positive | 33 (77) | 29 (71) | 19 (49) | 14 (39) |
| n=45 | n=40 | n=36 | n=35 | |
| Serum THC-COOH positive | 32 (71) | 26 (65) | 16 (44) | 13 (37) |
*
Denominator available for each item is reported. Missing data are present at each visit due to some participants not providing complete data or biosamples. For example, one of the 46 participants did not provide self-report data at the first visit but provided all other data at that visit and for the duration of the study. THC-COOH is 11-nor-9-carboxy-delta-9-tetrahydrocannabinol.