Table 4 Modified effects of socio-demographic, sexual behavioural factors and HPV-related knowledge on the associations between signing up with family doctors and cervical cancer screening behaviors (N = 4389)
Modified factor | Signing up with family doctors | Past screening participation | Future screening willingness | ||
|---|---|---|---|---|---|
OR (95%CI) a | OR (95%CI) b | OR (95%CI) a | OR (95%CI) b | ||
Age (year) | |||||
 21–30 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.53 (1.22, 1.92) | 1.24 (0.97, 1.59) | 2.35 (1.46, 3.55) | 1.73 (1.11, 2.72) | |
 31–40 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.36 (1.14, 1.62) | 1.11 (0.92, 1.34) | 2.15 (1.44, 3.21) | 1.58 (1.04, 2.41) | |
 41–65 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.18 (0.90, 1.55) | 1.17 (0.86, 1.60) | 2.84 (1.64, 4.91) | 2.29 (1.23, 4.29) | |
 P for multiplicative interaction |  | 0.36 | 0.67 | 0.72 | 0.71 |
Ethnicity | |||||
 Han | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.46 (1.29, 1.66) | 1.10 (0.96, 1.26) | 2.46 (1.88, 3.21) | 1.73 (1.30, 2.30) | |
 Others | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.60 (1.04, 2.44) | 1.42 (0.86, 2.33) | 1.81 (0.82, 4.01) | 1.59 (0.59, 4.31) | |
 P for multiplicative interaction |  | 0.70 | 0.21 | 0.47 | 0.46 |
Local household registration | |||||
 Yes | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.06 (0.74, 1.51) | 0.83 (0.55, 1.25) | 1.66 (0.55, 5.01) | 1.29 (0.36, 4.66) | |
 No | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.48 (1.30, 1.68) | 1.18 (1.02, 1.35) | 2.35 (1.81, 3.05) | 1.71 (1.30, 2.26) | |
 P for multiplicative interaction |  | 0.084 | 0.30 | 0.55 | 0.63 |
Marital status | |||||
 Single/divorced/widow | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.78 (1.20, 2.65) | 1.53 (0.96, 2.43) | 1.06 (0.58, 1.97) | 0.82 (0.40, 1.72) | |
 Married | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.33 (1.17, 1.52) | 1.10 (0.96, 1.26) | 2.68 (2.03, 3.54) | 1.91 (1.42, 2.56) | |
 P for multiplicative interaction |  | 0.18 | 0.30 | 0.007 | 0.026 |
Education level | |||||
 Junior middle school or below | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.51 (1.26, 1.82) | 1.22 (1.00, 1.49) | 2.43 (1.75, 3.37) | 1.76 (1.24, 2.49) | |
 Senior middle school | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.25 (0.99, 1.47) | 1.10 (0.86, 1.41) | 2.23 (1.31, 3.80) | 1.60 (0.90, 2.83) | |
 College or above | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.66 (1.33, 2.08) | 1.12 (0.86, 1.46) | 1.78 (0.94, 3.39) | 1.39 (0.69, 2.80) | |
 P for multiplicative interaction |  | 0.19 | 0.48 | 0.70 | 0.83 |
Occupation type | |||||
 Administrators/Professionals | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.65 (1.24, 2.20) | 1.10 (0.78, 1.56) | 2.44 (1.07, 5.60) | 1.90 (0.75, 4.81) | |
 Workers | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.45 (1.17, 1.79) | 1.29 (1.02, 1.63) | 2.69 (1.86, 3.89) | 1.64 (1.10, 2.45) | |
 Business services personnel | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.14 (0.84, 1.56) | 0.85 (0.60, 1.21) | 2.05 (0.94, 4.47) | 1.66 (0.70, 3.92) | |
 Housewife/unemployed women | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.60 (1.20, 2.13) | 1.38 (1.01, 1.89) | 1.76 (0.92, 3.37) | 1.26 (0.62, 2.56) | |
 Others | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.57 (1.16, 2.12) | 1.23 (0.87, 1.74) | 2.59 (1.37, 4.89) | 1.87 (0.92, 3.76) | |
 P for multiplicative interaction |  | 0.45 | 0.22 | 0.83 | 0.96 |
Monthly income (CNY) | |||||
  < 5,000 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.55 (1.32, 1.82) | 1.22 (1.03, 1.46) | 2.44 (1.75, 3.40) | 1.54 (1.08, 2.21) | |
 5,000–7999 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.33 (1.07, 1.66) | 1.01 (0.79, 1.30) | 2.31 (1.49, 3.57) | 2.07 (1.29, 3.34) | |
  ≥ 8000 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.39 (1.01, 1.92) | 1.03 (0.71, 1.50) | 1.92 (0.78, 4.69) | 1.25 (0.43, 3.61) | |
 P for multiplicative interaction |  | 0.54 | 0.55 | 0.88 | 0.73 |
Health insurance | |||||
 No | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 0.75 (0.49, 1.14) | 0.63 (0.40, 1.00) | 1.31 (0.73, 2.36) | 0.74 (0.37, 1.46) | |
 Yes | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.48 (1.30, 1.68) | 1.21 (1.05, 1.39) | 2.56 (1.93, 3.39) | 1.97 (1.47, 2.64) | |
 P for multiplicative interaction |  | 0.002 |  < 0.001 | 0.044 | 0.005 |
Age at sexual debut (year) | |||||
  < 18 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.05 (0.72, 1.53) | 0.81 (0.53, 1.26) | 1.30 (0.66, 2.57) | 0.93 (0.42, 2.07) | |
 18–24 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.37 (1.19, 1.58) | 1.11 (0.95, 1.30) | 2.55 (1.88, 3.46) | 1.82 (1.32, 2.51) | |
  ≥ 25 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 2.25 (1.69, 3.00) | 1.59 (1.16, 2.18) | 2.89 (1.54, 5.41) | 1.89 (0.96, 3.74) | |
 P for multiplicative interaction |  | 0.002 | 0.009 | 0.17 | 0.19 |
The number of lifetime sexual partners | |||||
 1 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.53 (1.32, 1.76) | 1.17 (1.01, 1.37) | 2.89 (2.16, 3.85) | 1.93 (1.42, 2.63) | |
 2 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.50 (1.12, 2.00) | 1.16 (0.84, 1.61) | 1.52 (0.80, 2.91) | 1.05 (0.52, 2.13) | |
  ≥ 3 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.23 (0.85, 1.79) | 1.04 (0.67, 1.60) | 1.12 (0.43, 2.88) | 0.86 (0.29, 2.54) | |
 P for multiplicative interaction |  | 0.58 | 0.35 | 0.051 | 0.061 |
Consistent condom use during sexual intercourse | |||||
 No | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.39 (1.22, 1.59) | 1.08 (0.93, 1.24) | 2.50 (1.91, 3.27) | 1.71 (1.28, 2.28) | |
 Yes | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.94 (1.46, 2.57) | 1.55 (1.11, 2.16) | 1.68 (0.79, 3.61) | 1.20 (0.52, 2.76) | |
 P for multiplicative interaction |  | 0.038 | 0.042 | 0.34 | 0.59 |
Parity | |||||
 0 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.61 (1.09, 2.38) | 1.51 (0.97, 2.35) | 1.64 (0.85, 3.17) | 1.52 (0.73, 3.19) | |
 1 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.13 (0.91, 1.40) | 0.94 (0.74, 1.19) | 2.39 (1.51, 3.77) | 1.57 (0.96, 2.58) | |
 2 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.47 (1.22, 1.76) | 1.20 (0.98, 1.46) | 2.28 (1.56, 3.31) | 1.55 (1.04, 2.32) | |
  ≥ 3 | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.39 (0.96, 2.01) | 1.28 (0.84, 1.94) | 5.15 (2.04, 13.02) | 3.33 (1.22, 9.10) | |
 P for multiplicative interaction |  | 0.24 | 0.25 | 0.27 | 0.33 |
HPV-related knowledge | |||||
 Low level (< 6) | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.56 (1.32, 1.83) | 1.39 (1.17, 1.65) | 2.00 (1.52, 2.62) | 1.61 (1.21, 2.14) | |
 High level (≥ 6) | No | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Yes | 1.16 (0.96, 1.40) | 0.94 (0.76, 1.16) | 2.26 (1.03, 4.94) | 1.80 (0.78, 4.16) | |
 P for multiplicative interaction |  | 0.019 | 0.004 | 0.77 | 0.42 |