Package requests (N) | Multivariate logistic regression | |||||
---|---|---|---|---|---|---|
Round 1 (N = 52628) | Round 2 (N = 41729) | |||||
n (%) | OR (95%CI) | p-value | n (%) | OR (95%CI) | p-value | |
Cell phone number providers (n) | 37,375 | 30,510 | ||||
Gender | 37,375 | 30,510 | ||||
Male | 33.2 | 1.0 | 32.3 | NA | NA | |
Female | 68.8 | 1.2 (1.0-1.4) | 0.008 | 67.7 | ||
Age | 37,374 | 30,510 | ||||
16-19 | 14.7 | 1.0 | 15.1 | 1.0 | ||
20-24 | 39.2 | 1.0 (1.0-1.1) | 0.23 | 40.4 | 1.1 (1.0-1.2) | 0.08 |
25-29 | 46.1 | 0.8 (0.8-0.9) | < 0.001 | 44.5 | 0.8 (0.8-0.9) | < 0.001 |
Ethnicity | 37,374 | 30,510 | ||||
Dutch | 61.2 | 1.0 | 60.1 | 1.0 | ||
Surinam/Antillean | 11.8 | 1.3 (1.2-1.4) | < 0.001 | 11.5 | 1.3 (1.2-1.4) | < 0.001 |
Turkish/Moroccan | 6.4 | 1.1 (1.0-1.2) | 0.04 | 6.3 | 1.1 (1.0-1.2) | 0.09 |
Sub Sahara African | 3.4 | 1.5 (1.3-1.8) | < 0.001 | 4.1 | 1.7 (1.5-2.0) | < 0.001 |
Western, other | 8.0 | 1.0 (0.9-1.1) | 0.66 | 8.6 | 1.0 (0.9-1.1) | 0.87 |
Non-Western, other | 9.2 | 1.1 (1.1-1.2) | 0.002 | 9.4 | 1.2 (1.1-1.3) | < 0.001 |
Region | 37,375 | 30,510 | ||||
Rotterdam | 57.4 | ns | ns | 55.0 | 1.0 | |
Amsterdam | 39.3 | 38.3 | 1.0 (0.9-1.0) | 0.35 | ||
South-Limburg | 3.3 | 6.7 | 0.8 (0.7-0.9) | < 0.001 | ||
Community risk level | 37,375 | 30,510 | ||||
Low | 34.9 | 1.0 | 34.4 | 1.0 | ||
Medium | 50.1 | 0.9 (0.8-0.9) | < 0.001 | 49.0 | 0.9 (0.9-1.0) | 0.006 |
High | 15.0 | 1.0 (0.9-1.0) | 0.24 | 16.6 | 0.9 (0.9-1.1) | 0.82 |
Educational level | 23,229 | 17,172 | ||||
Low | 5.0 | 1.0 | 4.9 | 1.0 | ||
Medium | 28.7 | 0.9 (0.8-1.0) | 0.17 | 28.8 | 1.0 (0.8-1.2) | 0.74 |
High | 66.3 | 0.8 (0.7-0.9) | 0.007 | 66.3 | 0.8 (0.7-1.0) | 0.05 |
Ethnicity SP | 13,998 | 9,638 | ||||
Concordant(NL/NL) | 54.8 | 1.0 | 54.1 | ns | ns | |
Discordant (NL/non-NL) | 26.9 | 1.0 (0.9-1.1) | 0.55 | 26.7 | ||
Concordant (non-NL/non-NL) | 18.3 | 1.4 (1.2-1.5) | < 0.001 | 19.2 | ||
Age at first sexual contact | 22,728 | 16,752 | ||||
≤5 | 29.3 | 1.0 | 30.6 | 1.0 | ||
16-18 | 52.6 | 0.8 (0.8-0.9) | < 0.001 | 52.9 | 0.8 (0.8-0.9) | < 0.001 |
≥ 19 | 18.1 | 0.7 (0.6-0.8) | < 0.001 | 16.5 | 0.6 (0.6-0.7) | < 0.001 |
Number of sexual partners < 6 months | 22,459 | 16,612 | ||||
No partner(s) | 8.5 | 1.0 | 7.9 | ns | ns | |
1 steady partner | 49.4 | 1.2 (1.0-1.5) | 0.12 | 44.5 | ||
1 casual partner | 11.7 | 1.2 (1.0-1.5) | 0.16 | 13.0 | ||
≥ 2 partners (incl. steady partner) | 30.4 | 1.5 (1.1-1.9) | 0.003 | 34.6 | ||
Duration steady partnership | 22,812 | 16,841 | ||||
< 1 year | 15.9 | 1.0 | 17.7 | 1.0 | ||
1-2 years | 20.9 | 1.0 (0.9-1.1) | 0.62 | 19.5 | 1.0 (0.9-1.1) | 0.18 |
3-5 years | 15.0 | 0.8 (0.7-0.9) | < 0.001 | 12.7 | 0.9 (0.8-1.0) | 0.01 |
≥ 6 years | 9.1 | 0.8 (0.7-0.8) | < 0.001 | 6.9 | 0.7 (0.6-0.8) | < 0.001 |
No steady partner | 39.1 | 1.5 (0.9-2.4) | 0.13 | 43.2 | 0.8 (0.7-0.9) | 0.001 |
Condom use last contact CP | 8,124 | 6,926 | ||||
Yes | 47.7 | 1.0 | 44.0 | 1.0 | ||
No | 52.3 | 1.2 (1.1-1.3) | < 0.001 | 56.0 | 1.1 (1.1-1.3) | 0.02 |
Condom use last contact SP | 13,876 | 9,547 | ||||
Yes | 15.8 | 1.0 | 16.0 | NA | NA | |
No | 84.2 | 1.2 (1.1-1.3) | < 0.001 | 84.0 | ||
History of STI | 3,175 | 8,442 | ||||
No STI ever | 68.1 | 1.0 | 68.8 | 1.0 | ||
Yes, < 6 months | 4.0 | 1.2 (0.8-2.0) | 0.38 | 4.0 | 1.2 (0.9-1.5) | 0.25 |
Yes, ≥ 6 months | 27.9 | 1.2 (1.0-1.5) | 0.03 | 27.2 | 1.2 (1.1-1.3) | 0.002 |
Symptoms of an STI | 5,649 | 13,284 | ||||
Yes | 38.1 | ns | ns | 40.1 | 1.0 | |
No | 61.9 | 59.9 | 0.7 (0.8-0.9) | < 0.001 |