Table 2.
Result from single interrupted time-series analysis of monthly referrals to, initial counselling session and total counselling sessions with Quitline in Central Queensland, Australia in three different periods between January 2014, to December 2019 (70 months, excluding 2 months buffer period between September 2017 to October 2017).
| Outcomes => |
Referral |
Initial counselling session |
Total counselling sessions |
NRT gums@ | NRT lozenges@ | NRT patches@ | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Incidence Rate Ratio (IRR) | IRR[95% CI] | Seasonality adjusted IRR[95% CI] | IRR[95% CI] | Seasonality adjusted IRR[95% CI] | IRR[95% CI] | Seasonality adjusted IRR[95% CI] | IRR[95% CI] | IRR[95% CI] | IRR[95% CI] | |
| Predictors | Level at Period 1 (Intercept) | 0•003 ***[0•002, 0•003] | 0•003 ***[0•002, 0•003] | 0•002 ***[0•002, 0•002] | 0•002 ***[0•002, 0•002] | 0•005 ***[0•005, 0•005] | 0•005 ***[0•005, 0•005] | NA | NA | NA |
| Baseline# trend (slope) | 1•012 ***[1•009, 1•015] | 1•013 ***[1•010, 1•017] | 0•994 **[0•990, 0.999] | 0•994 *[0•990, 0•999] | 0•999[0•997, 1•002] | 0•999[0•996, 1•001] | 1•081 ***[1•074, 1•087] | 1•150 ***[1•141, 1•159] | 1•165 ***[1•155, 1•174] | |
| Level in Period 2 | 1•128 *[1•022, 1•246] | 1•040[0•939, 1•151] | 1•621 ***[1•397, 1•882] | 1•555 ***[1•332, 1•815] | 1•583 ***[1•459, 1•718] | 1•561 ***[1•435, 1•698] | 0•107 ***[0•104, 0•110] | 0•054 ***[0•052, 0•056] | 0•046 ***[0•044, 0•047] | |
| Level in Period 3 | 3•772 ***[2•994, 4•754] | 4•307 ***[3•396, 5•462] | 2•549 ***[1•795, 3•621] | 3•113 ***[2•169, 4•466] | 3•427 ***[2•872, 4•089] | 3•993 ***[3•332, 4•784] | 6•739 ***[6•536, 6•949] | 12•706 ***[12•218, 13•215] | 8•409 ***[8•057, 8•777] | |
| Slope in Period 3 | 0.987 ***[0.983, 0.992] | 0.986 ***[0.981, 0•990] | 0•997[0•990, 1•003] | 0•994[0•987, 1•001] | 0•995 **[0•991, 0•998] | 0•993 ***[0•989, 0•996] | 0•914 ***[0•908, 0•920] | 0•862 ***[0•855, 0•868] | 0•842 ***[0•835, 0•849] | |
| Model fit | AIC | 813•355 | 757•007 | 666•541 | 635•415 | 935•356 | 838•317 | 23238•056 | 28821•883 | 4068•585 |
| BIC | 824•598 | 777•244 | 677•784 | 655•652 | 946•599 | 858•553 | 23244•042 | 28827•869 | 4074•571 | |
| R[2] | 0•884 | 0•909 | 0•765 | 0•804 | 0•928 | 0•945 | 0•636 | 0•648 | 0•824 | |
Notes:*** p < 0•001; ** p < 0•01; * p < 0•05.
Referral:the number of client referrals to the Quitline service received by the Health Contact Centre of Queensland Health (HCC). This could be either by client self-referral or third party referral from another person or organisation.
Participation/ Initial counselling session: the number of clients who completed at least the first Quitline call.
Interaction/ Total counselling sessions: the number of individual Quitline telephone counselling sessions completed in the study area comprising of initial and subsequent calls.
NRT gum dispatch: the number of nicotine gum (4 mg) pieces dispatched to Intensive Quit Support Program (IQSP) clients.
NRT lozenge dispatch: the number of nicotine lozenges (4 mg) dispatched to IQSP clients.
NRT patch dispatch: the number of nicotine patches (21 mg) dispatched to IQSP clients.
Period 1= Pre-launch period of any intervention (Jan-2014 to Jan-2017), N=44 months;Period 2= Time between launching of IQSP by Quitline until the “10,000 Lives” started to work (February 2017 to August 2017), N=07 months;Period 3 = Post-launch period of “10,000 Lives”(November 2017 to December 2019), N=26 months; @ Data of this outcome during pre-intervention is only for 7 periods which may cause error in estimation and adjustment of seasonality is not viable. # Baseline period for the outcomes: Referral, initial counselling session and total counselling sessions is Period 1 and for NRT gum, lozenge and patch is Period 2.