Oral cancer is a major public health issue in India with ∼77,000 new cases and 52,000 deaths yearly. Paan chewing, tobacco and alcohol use are strong risk factors for this cancer in India. Human ...papillomaviruses (HPVs) are also related to a subset of head and neck cancers (HNCs). We examined the association between oral HPV and oral cancer in a sample of Indian subjects participating in a hospital‐based case‐control study. We recruited incident oral cancer cases (N = 350) and controls frequency‐matched by age and sex (N = 371) from two main referral hospitals in Kerala, South India. Sociodemographic and behavioral data were collected by interviews. Epithelial cells were sampled using Oral CDx® brushes from the oral cancer site and the normal mucosa. Detection and genotyping of 36 HPV genotypes were done using a polymerase chain reaction protocol. Data collection procedures were performed by qualified dentists via a detailed protocol with strict quality control, including independent HPV testing in India and Canada. HPV DNA was detected in none of the cases or controls. Associations between oral cancer and risk factors usually associated with HPV infection, such as oral sex and number of lifetime sexual partners, were examined by logistic regression and were not associated with oral cancer. Lack of a role for HPV infection in this study may reflect cultural or religious characteristics specific to this region in India that are not conducive to oral HPV transmission. A nationwide representative prevalence study is needed to investigate HPV prevalence variability among Indian regions.
What's new?
A new study out of southern India shows that HPV is not the culprit behind the widespread oral cancer in that region. Recently, HPV has been implicated in HNC cases worldwide, and may be responsible for a burgeoning epidemic. Because oral cancer is so prevalent in southern India, the authors wanted to know whether the virus plays a role, especially because an HPV vaccine is available. When they tested for 36 HPV subtypes in oral cancer cases and controls, however, they found no HPV DNA in any of the individuals.
India’s dominant private healthcare sector is the destination for 60–85% of initial tuberculosis care-seeking. The COVID-19 pandemic in India drastically affected TB case notifications in the first ...half of 2020. In this survey, we assessed the impact of the first wave of COVID-19 in India on private providers, and changes they adopted in their practice due to the pandemic.
The Joint Effort for Elimination of TB (JEET) is a nationwide Global Fund project implemented across 406 districts in 23 states to extend quality TB services to patients seeking care in private sector. We conducted a rapid survey of 11% (2,750) of active providers engaged under JEET’s intense Patient Provider Support Agency (PPSA) model across 15 Indian states in Q1 (February–March) of 2021. Providers were contacted in person or telephonically, and consenting participants were interviewed using a web-based survey tool. Responses from participants were elicited on their practice before COVID-19, during the 2020 lockdowns (March–April 2020) and currently (Q1 2021). Data were adjusted for survey design and non-response, and results were summarised using descriptive statistics and logistic regression.
Of the 2,750 providers sampled, 2,011 consented and were surveyed (73 % response). Nearly 50 % were between 30 and 45 years of age, and 51 % were from Uttar Pradesh, Maharashtra and Gujarat. Seventy percent of providers reported reduced daily out-patient numbers in Q1 2021 compared to pre-COVID times. During the lockdown, 898 (40 %) of providers said their facilities were closed, while 323 (11 %) offered limited services including teleconsultation. In Q1 2021, 88 % of provider facilities were fully open, with 10 % providing adjusted services, and 4 % using teleconsultation. Only 2 % remained completely closed. Majority of the providers (92 %) reported not experiencing any delays in TB testing in Q1 2021 compared to pre-COVID times. Only 6 % reported raising costs at their clinic, mostly to cover personal protective equipment (PPE) and other infection control measures, although 60–90 % implemented various infection control measures. Thirty-three percent of TB providers were ordering COVID-19 testing, in addition to TB testing.
To adapt, 82% of survey providers implemented social distancing and increased timing between appointments and 83% started conducting temperature checks, with variation by state and provider type, while 89% adopted additional sanitation measures in their facilities. Furthermore, 62% of providers started using PPE, and 13% made physical changes (air filters, isolation of patient areas) to their clinic to prevent infection. Seventy percent of providers stated that infection control measures could decrease TB transmission.
Although COVID-19 restrictions resulted in significant declines in patient turn-out at private facilities, our analysis showed that most providers were open and costs for TB care remained mostly the same in Q1 2021. As result of the COVID-19 pandemic, several positive strategies have been adapted by the private sector TB care providers. Since the subsequent COVID-19 waves were more severe or widespread, additional work is needed to assess the impact of the pandemic on the private health sector.
Objectives
Paan chewing is a recognized risk factor for oral cancer in the Asian population. However, there is currently little evidence about the intergenerational psychosocial transmission of paan ...chewing in South Indian families. We investigated the association between parental and participant's paan chewing in a South Indian population.
Methods
A subset of data was drawn from a hospital‐based case–control study on oral cancer, the HeNCe Life study, conducted at Government Dental and Medical Colleges of Kozhikode, South India. Analyses were based on 371 noncancer control participants having diseases unrelated to known risk factors for oral cancer. Demographics, behavioral habits (e.g., paan chewing, smoking), and indicators of socioeconomic position (SEP) of both participants and their parents were collected with the use of a questionnaire‐based interview and a life grid technique. Unconditional logistic regression assessed odds ratios (OR) and 95% confidence intervals (95% CI) for the associations between parental and participant's paan chewing, adjusted for confounders.
Results
Over half of the participants were males (55.2%), and the mean age of participants was 59 (SD = 12) years. After adjusting for age, religion, parents’ SEP, parents’ education, smoking and alcohol consumption, and perceived parenting behavior, we observed that maternal paan chewing and paternal paan chewing were significantly associated with the participant's paan chewing (OR = 2.40, 95% CI = 1.11–5.21 and OR = 3.05, 95% CI = 1.48–6.27, respectively).
Conclusions
Intergenerational psychosocial transmission of the habit of paan chewing could occur through shared sociocultural or environmental factors.
Objectives
The incidence of oral cancer has been rapidly increasing in India, calling for evidence contributing to a deeper understanding of its determinants. Although disadvantageous life‐course ...socioeconomic position (SEP) is independently associated with the risk of these cancers, the explanatory mechanisms remain unclear. Possible pathways may be better understood by testing which life‐course model most influences oral cancer risk. We estimated the association between life‐course SEP and oral cancer risk under three life‐course models: critical period, accumulation and social mobility.
Methods
We recruited incident oral cancer cases (N = 350) and controls (N = 371) frequency‐matched by age and sex from two main referral hospitals in Kozhikode, Kerala, India, between 2008 and 2012. We collected information on childhood (0‐16 years), early adulthood (17‐30 years) and late adulthood (above 30 years) SEP and behavioural factors along the life span using interviews and a life‐grid technique. Odds ratios (OR) and 95% confidence intervals (CI) were estimated for the association between life‐course SEP and oral cancer risk using inverse probability weighted marginal structural models.
Results
Relative to an advantageous SEP in childhood and early adulthood, a disadvantageous SEP was associated with oral cancer risk (OR = 2.76, 95% CI: 1.99, 3.81) and (OR = 1.84, 95% CI: 1.21, 2.79), respectively. In addition, participants who were in a disadvantageous (vs advantageous) SEP during all three periods of life had an increased oral cancer risk (OR = 4.86, 95% CI: 2.61, 9.06). The childhood to early adulthood social mobility model and overall life‐course trajectories indicated strong influence of exposure to disadvantageous SEP in childhood on the risk for oral cancer.
Conclusions
Using novel approaches to existing methods, our study provides empirical evidence that disadvantageous childhood SEP is critical for oral cancer risk in this population from Kerala, India.
Some studies suggest that periodontal diseases increase the risk of oral cancer, but contradictory results also exist. Inadequate control of confounders, including life course exposures, may have ...influenced prior findings. We estimate the extent to which high levels of periodontal diseases, measured by gingival inflammation and recession, are associated with oral cancer risk using a comprehensive subset of potential confounders and applying a stringent adjustment approach. In a hospital‐based case‐control study, incident oral cancer cases (N = 350) were recruited from two major referral hospitals in Kerala, South India, from 2008 to 2012. Controls (N = 371), frequency‐matched by age and sex, were recruited from clinics at the same hospitals. Structured interviews collected information on several domains of exposure via a detailed life course questionnaire. Periodontal diseases, as measured by gingival inflammation and gingival recession, were evaluated visually by qualified dentists following a detailed protocol. The relationship between periodontal diseases and oral cancer risk was assessed by unconditional logistic regression using a stringent empirical selection of potential confounders corresponding to a 1% change‐in‐estimates. Generalized gingival recession was significantly associated with oral cancer risk (Odds Ratio = 1.83, 95% Confidence Interval: 1.10–3.04). No significant association was observed between gingival inflammation and oral cancer. Our findings support the hypothesis that high levels of periodontal diseases increase the risk of oral cancer.
What's new?
Can gum disease predict the onset of oral cancer? As with many such questions, there's data supporting both sides. A new report comes down on the side of yes—periodontal disease is associated with risk of oral cancer. It's a complex question, because both gum disease and oral cancer share certain established risk factors, such as smoking. These authors applied stringent criteria to correct for potential confounders. They evaluated periodontal disease by measuring inflammation and recession of the gums and determined that gingival recession—but not inflammation—did significantly associate with oral cancer risk.
The evidence for genetic polymorphisms in genes encoding cytochrome P450 (CYP) and glutathione S-transferase (GST) enzymes as risk factors for squamous cell carcinomas of the head and neck (SCCHN) in ...Caucasians is conflicting. Furthermore, the interactive effects with smoking have not been documented. We estimated the effects of five single nucleotide polymorphisms and two copy number variants associated with CYP and GST genes, as well as their interactive effects with smoking, on SCCHN risk among Caucasians from a case-control study conducted in Montreal, Canada. The study involved 389 incident SCCHN cases and 429 controls, frequency-matched by age and sex, recruited from four main hospitals between 2005 and 2013. Life-course-based interviews collected information on tobacco smoking history and other risk behaviors. DNA was isolated from oral exfoliated cells and genotyped for genetic variants. Unconditional logistic regression models estimated odds ratios (OR) and 95% confidence intervals (CI) for main, joint effect, stratum-specific and interaction estimates among non-, moderate and heavy smokers. Carriers of GSTP1 105Val (versus non-carriers) had a lower risk of SCCHN (OR = 0.71, 95% CI: 0.53, 0.95), which was observed for heavy smokers (OR = 0.59, 95% CI: 0.36, 0.95) and non-smokers alike (OR = 0.49, 95% CI: 0.24, 0.98). The decreased risk associations were also conserved among human papillomavirus negative individuals. There was no evidence for statistical interaction with smoking on additive or multiplicative scales for any of the variants analyzed. Of CYP and GST polymorphisms detected in Canadian Caucasians, only GSTP1 105Val was associated with a decreased risk for SCCHN.
Oral cancer is a major public health issue in India with ∼77,000 new cases and 52,000 deaths yearly. Paan chewing, tobacco and alcohol use are strong risk factors for this cancer in India. Human ...papillomaviruses (HPVs) are also related to a subset of head and neck cancers (HNCs). We examined the association between oral HPV and oral cancer in a sample of Indian subjects participating in a hospital‐based case‐control study. We recruited incident oral cancer cases (
N
= 350) and controls frequency‐matched by age and sex (
N
= 371) from two main referral hospitals in Kerala, South India. Sociodemographic and behavioral data were collected by interviews. Epithelial cells were sampled using Oral CDx® brushes from the oral cancer site and the normal mucosa. Detection and genotyping of 36 HPV genotypes were done using a polymerase chain reaction protocol. Data collection procedures were performed by qualified dentists
via
a detailed protocol with strict quality control, including independent HPV testing in India and Canada. HPV DNA was detected in none of the cases or controls. Associations between oral cancer and risk factors usually associated with HPV infection, such as oral sex and number of lifetime sexual partners, were examined by logistic regression and were not associated with oral cancer. Lack of a role for HPV infection in this study may reflect cultural or religious characteristics specific to this region in India that are not conducive to oral HPV transmission. A nationwide representative prevalence study is needed to investigate HPV prevalence variability among Indian regions.
What's new?
A new study out of southern India shows that HPV is not the culprit behind the widespread oral cancer in that region. Recently, HPV has been implicated in HNC cases worldwide, and may be responsible for a burgeoning epidemic. Because oral cancer is so prevalent in southern India, the authors wanted to know whether the virus plays a role, especially because an HPV vaccine is available. When they tested for 36 HPV subtypes in oral cancer cases and controls, however, they found no HPV DNA in any of the individuals.
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